CCNA第二学期期末考试FinalEam

路由器获知到的第一条路径仅使用路由器获知到的前两条路径路由器获知到的最后一条路径所有四条路径对于为防止路由环路而通过毒性反转实现的水平分割方法，哪两项叙述正确？（选择两项。

）所有 Cisco IOS 都会默认启用此方法。

会将一个表示无穷大度量的值分配给路由以将其毒化。

将毒化路由更新发回该更新的发送接口。

指示路由器将可能会影响路由的更改保持一段特定的时间。

限制数据包在被丢弃之前能够在网络中传输的跳数。

在两台路由器能够使用 OSPF 形成邻居邻接关系之前必须完成哪两项任务？（选择两项。

）路由器必须选举出指定路由器。

路由器必须在网络类型方面达成一致。

路由器必须使用相同的 dead 时间间隔。

路由器必须交换链路状态请求。

路由器必须交换数据库描述数据包。

下列路由器组件和操作的配对中，哪两项是正确的？（选择两项。

）D RAM - 加载 bootstrapR AM - 存储操作系统闪存 - 启动时执行诊断N VRAM - 存储配置文件R OM - 存储备份配置文件P OST - 运行硬件模块诊断下列关于无类路由协议的陈述，哪两项是正确的？（选择两项。

）无类路由协议可用于不连续子网。

无类路由协议可在路由更新中转发超网路由。

无类路由协议无法在路由表中实施有类路由。

无类路由协议仅使用跳数度量。

无类路由协议的路由更新中不包含子网掩码。

请参见图示。

在图示的其中一台设备上运行了show cdp neighbors命令。

根据此信息，可推断出哪两项结论？（选择两项。

）在路由器上运行了该命令。

A BCD 是一台非 CISCO 设备。

两台设备间存在第 3 层连通性。

A BCD 支持路由功能。

A BCD 连接到相邻设备的 Fa0/0 接口。

请参见图示。

网络连接有三台路由器：R1、R2 和 R3。

图中显示了所有三台路由器的路由。

从该输出可以得到什么结论？R1 和 R3 通过 S0/0/0 接口相连。

R1 S0/0/0 接口的 IP 地址为 10.1.1.2。

关闭窗口考试系统考试浏览器 - ENetwork Final Exam - CCNA Exploration: Network Fundamentals (版本下面是考试的考试试题以及与题目关联的评分规则。

思科网络技术学院的内容是受到版权保护的,禁止一切未经授权的张贴,分发或共享本考试的内容.1下列哪一个 OSI 层负责管理数据段？应用层表示层会话层传输层2请参见图示。

图中所示为客户端之间发送电子邮件的过程。

以下哪一列表正确地标识了图中各编号阶段使用的组件或协议？3第 4 层报头包含帮助数据传输的哪一类信息？服务端口号主机逻辑地址设备物理地址虚拟连接标识符4哪个 OSI 层提供面向连接的可靠数据通信服务？应用层表示层会话层传输层网络层5当 OSI 模型下层执行无连接协议时，通常使用什么来确认数据已收到并请求重传丢失的数据？IPUDP以太网无连接确认面向连接的上层协议或服务6下列哪三项是 CSMA/CD 的特征？（选择三项。

）设备会侦听介质，并且仅当无法检测到介质上存在其它信号时才会传输数据。

介质上的所有设备均可侦听所有通信。

设备根据配置的优先级来进行通信。

发生冲突后，引起冲突的设备会优先尝试传输数据。

发生冲突时，所有设备会在一段时间内停止传输数据，该段时间的长度随机决定。

CSMA/CD 使用令牌系统来避免冲突。

7在封装过程中，传输层添加什么标识符？源 IP 地址和目的 IP 地址源 MAC 地址和目的 MAC 地址源端口号和目的端口号源通道标识符和目的通道标识符8数据链路层有哪两项功能？（选择两项）分割和记录数据。

在源主机和目的主机上运行的程序之间进行数据交换。

控制数据如何传递到介质中。

生成信号以表示每个帧中的比特。

使用帧头和帧尾封装每个数据包，以便在本地介质中进行传输。

9请参见图示。

网络中的主机 A 和 B 正在传输层交换数据段。

下列关于此交换的陈述，哪两项是正确的？（选择两项）主机 A 正在使用 FTP 向主机 B 传输文件。

1Which of the following are required when adding a network to the OSPF routing process conf iguration? (Choose three.)network addressloopback addressautonomous system numbersubnet maskwildcard maskarea ID2Using default settings, what is the next step in the router boot sequence after t he IOS loads from flash?Perf orm the POST routine.Search for a backup IOS in ROM.Load the bootstrap program f rom ROM.Load the running-config file from RAM.Locate and load the startup-config file from NVRAM.3Refer to the exhibit. What is the most efficient summarization of the routes attached to router R1?198.18.0.0/16198.18.48.0/21198.18.32.0/22198.18.48.0/23198.18.49.0/23198.18.52.0/224Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statem (Choose three.)The missing information f or Blank 1 is the command show ip route .The missing information f or Blank 1 is the command debug ip route .The missing information f or Blank 2 is the number 100.The missing information f or Blank 2 is the number 120.The missing information f or Blank 3 is the letter R.The missing information f or Blank 3 is the letter C.5Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose t wo.)10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/246When presented with multiple valid routes to a destination, what criteria does a router use to determine which routes to add to the routing table?The router selects the routes with the best metric. All routes that hav e the same best metric are added to the routing table.The router f irst selects routes with the lowest administrative distance. The resulting routes are then prioritized by metric and the routes with the best metric arouting table.The router selects the routes with the lowest administrativ e distance. All routes with the same lowest administrative distanc e are added to the routing table.The router installs all routes in the routing table but uses the route with the best metric most when load balancing.7Refer to the exhibit. All routers in the network are running RIPv2 and EIGRP with default routing protocol settings and have interfaces configured with the bandwidths t exhibit. Which protocol will be used and how will traffic between the Router1 LAN and Router5 LAN be routed through the network?RIPv2 will load balance across both paths between Router1 and Router5.EIGRP will load balance across both paths between Router1 and Router5.RIPv2 traffic will use the path Router1, Router2, Router5 because it has the least hops.EIGRP traffic will use the path Router1, Router3, Router4, Router5 because it has the best metric.8Of the listed routing protocols, which two will propogate LSPs to all neighbors? (Choose two.)IS-ISEIGRPOSPFRIPv1RIPv29Refer to the exhibit. Routers 1 and 2 are directly connected over a serial link. Pings are f ailing between the two routers. W hat change by the administrator will correctSet the encapsulation on both routers to PPP.Decrease the bandwidth on Serial 0/1/0 on router 2 to 1544.Change the cable that connects the routers to a crossover cable.Change the IP address on Serial 0/1/0 on router 2 to 192.168.0.1/30.10Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)The route to network 172.16.0.0 has an AD of 156160.Network 192.168.0.16 can best be reached using FastEthernet0/0.The AD of EIGRP routes has been manually changed to a value other than the default value.Router1 is running both the EIGRP and OSPF routing process.Network 172.17.0.0 can only be reached using a default route.No default route has been conf igured.11Which statement correctly describes a feasible successor in EIGRP?It is a primary route that is stored in the routing table.It is a backup route that is stored in the routing table.It is a primary route that is stored in the topology table.It is a backup route that is stored in the topology table.12Refer to the exhibit. A ping from R1 to 10.1.1.2 is successful, but a ping from R1 to 192.168.2.0 fails. What is the cause of this problem?There is no gateway of last resort at R1.The serial interf ace between the two routers is down.A default route is not configured on R1.The static route for 192.168.2.0 is incorrectly conf igured.13Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required toSwitch the cable with a known working cable.Issue the no shutdown command on the interface.Configure the interf ace as a loopback interface.Set the encapsulation for the interface.14Which two locations can be the source of the Cisco IOS that is used by a router during the bootup process? (Choose two.)flash memoryRAMNVRAMTFTP serverconfiguration register15All routers in a network are configured in a single OSPF area with the same priority value. No loopback interface has been set on any of the routers. Which secondrouters use to determine the router ID?The highest MAC address among the active interfaces of the network will be used.There will be no router ID until a loopback interf ace is configured.The highest IP address among the activ e FastEthernet interfaces that are running OSPF will be used.The highest IP address among the activ e interfaces will be used.16Refer to the exhibit. A network administrator has conf igured OSPF using the following command:network 192.168.1.32 0.0.0.31 area 0Which router interf ace will participate in OSPF?FastEthernet0/0FastEthernet0/1Serial0/0/0Serial0/0/117Refer to the exhibit. All routers are properly configured with default configurations and are running the OSPF routing protocol. The network is f ully converged. A host on th with a host on the 192.168.2.0/24 network.Which path will be used to transmit the data?The data will be transmitted v ia R3-R2.The data will be transmitted v ia R3-R1-R2.The traffic will be load-balanced between two paths — one via R3-R2, and the other via R3-R1-R2.The data will be transmitted v ia R3-R2, and the other path via R3-R1-R2 will be retained as the backup path.18Which two situations require the use of a link-state protocol? (Choose two.)Fast convergence of the network is critical.The network is very large.The network administrator has limited knowledge to configure and troubleshoot routing protocols.The network is a flat network.The capacity of the router is low.19Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the v alue that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.20In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes. Which route will be used to reach this nD 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/021Which statement is true about the RIPv1 protocol?It is a link-state routing protocol.It excludes subnet information from the routing updates.It uses the DUAL algorithm to insert backup routes into the topology table.It uses classless routing as the default method on the router.22Refer to the exhibit. The 10.4.0.0 network f ails. What mechanism prevents R2 f rom receiving false update information regarding the 10.4.0.0 network?split horizonhold-down timersroute poisoningtriggered updates23Which statement is true about the metrics used by routing protocols?A metric is a value used by a particular routing protocol to compare paths to remote networks.A common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.24Refer to the exhibit. Both routers are using the RIPv2 routing protocol and static routes are undef ined. R1 can ping 192.168.2.1 and 10.1.1.2, but is unable to ping 192.16 What is the reason for the ping f ailure?The serial interf ace between two routers is down.R2 is not forwarding the routing updates.The 192.168.4.0 network is not included in the RIP configuration of R2.RIPv1 needs to be configured.25Which statement correctly describes a feature of RIP?RIP is a link-state routing protocol.RIP uses only one metric—hop count— for path selection.Adv ertised routes with hop counts greater than 10 are unreachable.Messages are broadcast every 10 seconds.26Refer to the exhibit. When the show cdp neighbors command is issued f rom router C, which devices will be displayed in the output?B, DA, B, DD, SWH-2SWH-1, A, BSWH-1, SWH-2A, B, D, SWH-1, SWH-227Refer to the exhibit. Although R2 is conf igured correctly, host A is unable to access the Internet. What are two static routes that can be c onfigured on R1, either of which w (Choose two.)ip route 0.0.0.0 0.0.0.0 Fa0/0ip route 0.0.0.0 0.0.0.0 Fa0/1ip route 0.0.0.0 0.0.0.0 10.1.1.1ip route 0.0.0.0 0.0.0.0 10.1.1.2ip route 209.165.202.0 255.255.255.0 10.1.1.128Which component is typically used to connect the WIC interface of a router to a CSU/DSU?V.35 cableRJ-45 adaptercrossover cablestraight-through cable29Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interf ace of Router2 in order to put the interf ace in the same networ interface of Router1?IP 172.16.0.18, subnet mask 255.255.255.0IP 172.16.32.15, subnet mask 255.255.255.240IP 172.16.0.18, subnet mask 255.255.255.252IP 172.16.32.18, subnet mask 255.255.255.25230Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?host Ahost Bhost Chost D31Refer to the exhibit. OSPF is used f or the routing protocol and all interf aces are configured with the correct IP addresses and subnet masks. During testing, it is foun unable to form an adjacency with R2. What is the cause of this problem?Both routers have been configured with incorrect router IDs.Both routers have been configured in different OSPF areas.Both routers have been configured with an incorrect network type.Both routers have been configured with different hello and dead intervals.32You hav e been asked to explain converged networks to a trainee. How would you accurately describe a converged network?A network is converged when all routers have f ormed an adjacency.A network is converged immediately after a topology change has occurred.A network is converged when all routers flush the unreachable networks from their routing tables.A network is converged after all routers share the same information, calculate best paths, and update their routing tables.33 A network administrator is in charge of two separate networks that share a single building. What dev ice will be required to connect the two networks and add a comthe Internet that can be shared?hubrouteraccess pointEthernet switch34Which port should a terminal emulator be connected to in order to access a router without network connectivity?T1serialconsoleFastEthernet35Refer to the exhibit. What needs to be done to allow these two routers to connect successf ully?Add a clock rate to S0/0/0 on R1.Add an interface description to S0/0/1 on R2.Change the serial interface on R2 to S0/0/0 so that it matches R1.Change the IP address of S0/0/1 on R2 so that it is in the same subnet as R1.36Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this router without entering a password?The login command was not entered on the console line.The enable password should be an enable secret password.No username and password combination has been configured.Console connections cannot be conf igured to require users to provide passwords.37Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?10.1.1.110.1.1.2172.16.1.1192.168.1.138Refer to the exhibit. The entire 192.168.1.0 network has been allocated to address hosts in the diagram. Utilizing VLSM with contiguous address blocks, which set of pref ixes could be used to create an addressing solution with a minimum waste of IP addresses?39What is a function of a router?It extends the Layer 2 broadcast domain.It eliminates collisions among PCs on the same local network.It provides connectivity among PCs on the same physical segment.It forwards packets to different IP networks based on Layer 3 inf ormation.40Refer to the exhibit. Which solution provides the most efficient use of router resources for forwarding traffic between BR and HQ?RIPRIPv2EIGRPstatic routes41Refer to the exhibit. A network administrator configures a static route on router R1 to reach the 192.168.1.0/24 network. Which IP address should be used as the next ip route command?192.168.1.1192.168.2.1192.135.250.1192.135.250.242Refer to the exhibit. The network is conf igured with RIPv2. However, network administrators notice that communication cannot be successfully completed f rom one L network administrator issues the show ip route command on the HQ router. Based on the output, what should be done to correct the problem?Disable the load balancing feature of RIPv2.Issue the no auto-summary command for RIPv2.Replace RIPv2 with EIGRP which supports VLSM.Make sure that the network statements include the correct subnet mask.43Which protocol is used by EIGRP to deliver and receive update packets?FTPRTPTCPTFTPUDP44Refer to the exhibit. What OSPF network statements are required for the router B to adv ertise the three networks that are attached?router ospf 1network 10.0.0.0 0.0.0.255 area 0router ospf 1network 10.1.1.0 0.3.255.255 area 0network 10.10.1.0 0.255.255.255 area 0network 10.20.1.0 0.255.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.255.255 area 0network 10.20.1.0 0.0.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.0.255 area 0network 10.20.1.0 0.0.0.255 area 045Which two v alues are used by default to calculate a metric in EIGRP? (Choose two.) loaddelayreliabilityhop countbandwidth46Refer to the exhibit. Which statement is true concerning the routing configuration?Using dy namic routing instead of static routing would hav e required f ewer configuration steps.The 10.1.1.0/24 and 10.1.2.0/24 routes have adjacent boundaries and should be summarized.Packets routed to the R2 Fast Ethernet interface require two routing table lookups.The static route will not work correctly.47Refer to the exhibit. On the basis of the show running-config output, which option correctly ref lects the routes that will be listed in the R2 routing table?48Refer to the exhibit. Which command should be issued to configure the address of the router interface that is attached to this computer?Router(config-if)# ip address 192.168.2.1 255.255.255.0Router(config-if)# ip address 192.168.2.2 255.255.255.0Router(config-if)# ip address 192.168.0.1 255.255.255.0Router(config-if)# ip address 192.168.0.2 255.255.255.049Refer to the exhibit. Which route will be removed from the routing table if manual EIGRP summarization is disabled on the Serial0/0/0 interface of Router3?0.0.0.0/0172.16.0.0/16172.16.1.0/24172.16.3.0/3050Refer to the exhibit. All interfaces are addressed and f unctioning correctly. The network administrator runs the tracert command on host A. Which two f acts could be output of this command? (Choose two.)The gateway for Host A is missing or improperly conf igured.The gateway for Host B is missing or improperly conf igured.The entry for 192.168.1.0/24 is missing f rom the routing table of R1.The entry for 192.168.1.0/24 is missing f rom the routing table of R2.The entry for 192.168.2.0/24 is missing f rom the routing table of R1.The entry for 192.168.2.0/24 is missing f rom the routing table of R2.。

CCNA2final期末考试答案A1.A technician configures the Fa0/0 interface on a router with ip address 192.168.3.5 255.255.255.252. What additional comma issued by the technician to activate the interface to forward traffic?Router(config-if)# exitRouter(config-if)# no shutdownRouter(config-if)# clock rateRouter# copy running-config startup-config2Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that interface FastEthernet0/1 is not functioning. Which action will most likely correct the problem with FastEthernet0/1?A clock rate should be added to the interface configuration.The subnet mask should be added to the interface configuration.An interface description needs to be added to the interface configuration.The no shutdown command needs to be added to the interface configuration.3Refer to the exhibit. A router interface is configured with the command ip address 172.16.3.31 255.255.192.0. Which set o values would allow a computer that is connected to the router interface to communicate with remote networks?A: 172.16.3.254B: 255.255.192.0C: 172.16.3.31A: 172.16.3.31B: 255.255.192.0C: 172.16.3.255A: 172.16.3.254B: 255.255.255.0C: 172.16.3.31A: 172.16.3.31B: 255.255.255.0C: 172.16.3.14Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be l routing table?ssss5Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem?An incorrect IP address is configured between the two routers.No static route is configured on Router2.A routing loop has occurred.No routing protocol is configured on either of the two routers.Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)The route to network 172.16.0.0 has an AD of 156160.Network 192.168.0.16 can best be reached using FastEthernet0/0.The AD of EIGRP routes has been manually changed to a value other than the default value.Router1 is running both the EIGRP and OSPF routing process.Network 172.17.0.0 can only be reached using a default route.No default route has been configured.7Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are displaye are operational and pings are not blocked on this network.Which ping will fail?from R1 to 172.16.1.1from R1 to 192.168.3.1from R2 to 192.168.1.1from R2 to 192.168.3.18Refer to the exhibit. A network administrator has configured OSPF using the following command:network 192.168.1.32 0.0.0.31 area 0Which router interface will participate in OSPF?FastEthernet0/0FastEthernet0/1Serial0/0/0Serial0/0/19Refer to the exhibit. The hosts on the R1 LAN are unable to access the Internet. What is incorrectly configured?the IP address of the Fa0/0 interface at R1the IP address of the S0/0/1 interface at R2the IP address of the S0/0/0 interface at R1the subnet mask of the S0/0/1 interface at R210Refer to the exhibit. Host A is having problems accessing server A. All routers have the same EIGRP configuration as rou What should be done so that host A can access server A?Add the command no auto-summary on all routers.Change the network statements to include a wildcard mask.Adjust the EIGRP hello timers to account for the network delay.Add the command eigrp log-neighbor-changes on all routers.Which feature of RIPv2 enables it to function as a classless routing protocol?Subnet masks are included in routing updates.Routing updates are triggered by topology changes.Next-hop addresses are included in routing updates.Multicast addresses are used to send routing updates.12A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 2000 h LANs. Which subnet mask should the administrator use to create the new subnets?255.255.224.0255.255.240.0255.255.248.0255.255.252.013 A network administrator is in charge of two separate networks that share a single building. What device will be required to two networks and add a common connection to the Internet that can be shared?hubrouteraccess pointEthernet switch14Refer to the exhibit. What needs to be done to allow these two routers to connect successfully?Add a clock rate to S0/0/0 on R1.Add an interface description to S0/0/1 on R2.Change the serial interface on R2 to S0/0/0 so that it matches R1.Change the IP address of S0/0/1 on R2 so that it is in the same subnet as R1.15In which situation would a default static route be recommended?when connecting an edge router to the Internetwhen variable length subnet masking is in effectwhen there is more than one valid route for a destination networkwhen a destination network has a larger mask than any routes in the routing tableRefer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load th configuration settings.What could be the cause of this problem?There is insufficient NVRAM.There is insufficient flash memory.The configuration register is not configured with the default setting.The system image file is not located in NVRAM.17Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?The IP address of host A is incorrect.The default gateway of host A is incorrect.The Fa0/1 interfaces of the two routers are configured for different subnets.The subnet mask for the Fa0/0 interface of R1 is incorrect.18Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configur operational. Both routers are configured to include all connected interfaces in routing updates. R2 is not showing any rout the routing table. What is the likely cause?The adjacent interfaces are passive.The distance of 120 exceeds 15 hops.19W hich two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.)authenticationlink-state advertisementshold-down timersSpanning Tree Protocolsplit horizon20Which prompt is used to allow a user to change the IP address of an interface on a router?Router>Router#Router(config)#Router(config-if)#Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0 result of adding this command?This route is automatically propagated throughout the network.The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.A static route is established.The traffic for all Class C networks is forwarded to 172.16.1.2.22Refer to the exhibit. What information can be determined from the displayed output?EIGRP packets are waiting to be sent to the neighbors.The adjacencies between the routers are yet to be established.The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interface.23Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this router entering a password?The login command was not entered on the cons ole line.The enable password should be an enable secret password.No username and password combination has been configured.Console connections cannot be configured to require users to provide passwords.24W hich of the following are primary functions of a router? (Choose two.)packet switchingmicrosegmentationdomain name resolutionpath selectionflow control25Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a static altered to accommodate a topology change?Negate the existing static route and configure a new static route with the correct next hop IP address.Do nothing. The existing static route will automatically update the next hop entry with the new IP address.Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP addresRefer to the exhibit. All routers are configured with no auto-summary. All routers have a default route via their Serial0/1 Router B receives a packet with a destination of 10.16.1.98. What path will the packet take?B-EB-E-D-AB-E-D-A then loop A-D-A until the TTL expiresB will immediately drop the packet.There is insufficient information to answer the question.27Refer to the exhibit. A network administrator is investigating why data packets with destination addresses of 172.16.10.10 192.168.10.100 are being dropped instead of being forwarded via the static route as expected. After confirming that the ip command has been applied on all routers in the network, what other action should the administrator take to ensure that da these addresses are forwarded via the static route?Check that all routers are configured with the same autonomous system number.Issue the no auto-summary command within the EIGRP configuration of all routers.Issue the no passive-interface command within the EIGRP configuration of all routers.Configure the static route to point to the next hop address instead of the outbound interface.28If a router is booting with its default configuration register setting and its NVRAM lacks boot system commands, from whe router try to load the IOS image first?ROMRAMNVRAMflashTFTP server29T wo routers need to be configured within a single OSPF area. Which two components need to be configured on both rout this? (Choose two.)the same process IDthe same area IDnetwork addresses and wildcard masksthe same router IDthe same loop back address30Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choos10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/24Which candidate route has the longest match for a packet with a destination address of 10.30.16.48?10.30.0.0/1610.30.15.0/2310.30.16.0/2410.30.16.32/2710.30.16.32/3032W hich three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a r (Choose three.)The router modifies the TTL field, decrementing it by one.The router changes the source IP to the IP of the exit interface.The router maintains the same source and destination IP.T he router changes the source physical address to the physical address of the exit interface.The router changes the destination IP to the IP of the exit interface.The router sends the packet out all other interfaces, besides the one it entered the router on.33Refer to the exhibit. The interfaces of all routers are configured for OSPF area 0. R3 can ping R1, but the two routers are establish a neighbor adjacency. What should the network administrator do to troubleshoot this problem?Check if the interfaces of the routers are enabled.Check the hello and dead intervals between the routers.Check the process ID of both routers.Check if CDP is enabled on all the routers.34W hich mechanism helps to avoid routing loops by advertising a metric of infinity?route poisoningsplit horizonhold-down timertriggered updates35Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which tw o devices for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge36Why is fast convergence desirable in networks that use dynamic routing protocols?Hosts are unable to access their gateway until the network is converged.Routers will not allow packets to be forwarded until the network is converged.Routers may make incorrect forwarding decisions until the network has converged.Routers will not allow configuration changes to be made until the network has converged.37Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. commands is required to configure a single area OSPF for the networks that are connected to R2?R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 138。

1. Which statements are true regarding VTY passwords? (Choose two.)VTY passwords must be encrypted.All VTY lines do not need to use the same password.A VTY password is required to establish telnet sessions.The VTY password is set with the command line console 0.The VTY password must be identical with the enable secret password. 2.Refer to the network and routing table entries shown in the graphic. What will happen when a packet destined for network 192.66.7.0 is received by Router A?It will be forwarded through interface S1.It will be forwarded to the default route.It will be directed toward the Internet.It will be discarded.3.Which command will produce the output shown in the graphic?show cdpshow cdp neighborsshow cdp neighbors detailshow cdp detail4.Router B received an interface configuration change. Suddenly, it transmits a new update. Which of the following could have triggered this update? (Choose two.)Router B received a configuration change.Router A sent a message requesting an update.Router C came online after Router B sent the RIP update.Router B received an error message indicating the last update was not received.5. How many Telnet sessions can take place simultaneously on a router running a standard edition of the IOS?458106. Which of the following WAN connection services typically use synchronous communications? (Choose two.)circuit-switchedleased linepacket-switchedEthernetanalog modem services7. Which of the following will add a TFTP server as a fallback source fora router to load an IOS image?Router# boot system tftp 163.150.9.31 c2500-d-l.120-9Router# copy run startRouter# boot system tftp c2500-d-l.120-9.bin 163.150.9.31Router# copy run startRouter# config tRouter(config)# boot system tftp c2500-d-l.120-9.bin 163.150.9.31 Router(config)# exitRouter# copy run startRouter# config tRouter(config)# boot system tftp 163.150.9.31 c2500-d-l.120-9.binRouter(config)# exitRouter# copy run start8. What types of messages are sent periodically by devices configured for CDP?probesbeaconssignalsadvertisementsrouting updatesunicast9. An administrator has made routing protocol changes to a ro uter’s configuration. To ensure that the changes are implemented, the active configuration is saved and the router is reloaded. After the router has initialized, the output on the screen displays "Would you like to enter the initial configuration dialog?[yes/no]:" Why did this dialog appear?There was a POST failure.The incorrect IOS loaded.There was an error in the startup configuration file.The configuration register was set to ignore NVRAM.10. Which command is used to redirect debug information to a device that is connected though a Telnet session?Router# monitorRouter# terminal redirect vty 0Router# terminal monitorRouter# monitor output vty 011. After issuing the show interfaces command, a technician notices the line "Serial1 is down, line protocol is down" in the output. Which of the following are possible reasons for this message output? (Choose three.)There is a mismatch in the encapsulation type on both ends of the link.A Layer 1 issue exists.An interface problem exists.The clockrate was not set during configuration.There is no usable media for the protocol.Keepalive messages are not being sent.12.Refer to the above graphic. When using RIP as the routing protocol, how would Chicago use load balancing to route packets to New York? (Choose two.)by forwarding packets over paths of equal costby forwarding packets according to hop count and speed of the linkby determining which interface has the least traffic and sending to it firstby first determining the speed of the links and then cycling packets through the fastest links firstby cycling packets through interfaces and routes following the same pattern (Router 1, 2, 3) each time13. When would the ROM monitor mode be used? (Choose two.) maintaining routing configuration settingsmodifying the IOS image stored in Flashrunning a limited IOS feature setperforming the bootstrap process14. Which two statements are true about route metrics? (Choose two.)The more factors that make up a metric, the greater the flexibility to tailor network operations.The larger the metric number, the better the path.Routing protocols use metrics to send routing updates to directly connected neighbors.Bandwidth and delay are static metrics used by RIP v1.Ticks, delay, and cost are metrics used by routing protocols.15.Which of the following are valid static IP routes? (Choose three.) RouterB(config)# ip route 192.168.5.0 255.255.255.0 S1RouterC(config)# ip route 192.168.1.0 255.255.255.0 S1RouterA(config)# ip route 192.168.3.0 255.255.255.0 192.168.2.2 RouterB(config)# ip route 192.168.1.0 255.255.255.0 192.168.2.2 RouterC(config)# ip route 192.168.2.0 255.255.255.0 192.168.4.1 RouterA(config)# ip route 192.168.4.0 255.255.255.0 192.168.2.116. Of the eight network users on the Human Resources department LAN, one cannot connect to the file serv er. The user’s PC has successfully booted but can not see the network. What should be checked first?the PC power cordthe file serverthe PC network interface card LEDsthe LAN switch in the wiring closetthe configuration of the router interface attached to the LAN17. What can be determined from the partial output of the show ip route command displayed below? (Choose two.)R 200.200.200.0/24 [120/1] via 192.168.10.2, 00:00:14, Serial0/0C 192.168.10.0/24 is directly connected, Serial0/0The next update will be in 76 seconds.The next update will be in 16 seconds.The administrative distance is 120 and the metric is 1.The metric is 120 and the administrative distance is 1.200.200.200.0 is configured on Serial0/0.192.168.10.2 is configured on Serial0/0.18. Why is it useful to have an interface description?A user can telnet to the router using the interface description.The interface description is a shortcut way to edit the running-config. The interface description helps identify distant network connections.The interface will remain inactive until an interface description is applied.19.Assume OSPF is being used on all routers. What happens when the link between Router1 and Router2 goes down? (Choose two.)Updates start broadcasting every 30 seconds.Updates start broadcasting every 90 seconds.Link-state advertisements are flooded.Link-state advertisements are sent only to neighboring routers.All routers note the change and adjust routes.All routers ignore the change until the route becomes active again. 20.The internetwork needs to communicate between the hosts connected to the E0 interface of the Utah router and hosts connected to the E0 interface of the Idaho router. The hosts should also have connectivity to the Internet. Which commands must be configured in order to enable this communication? (Choose three.)Idaho(config)# ip route 172.31.1.0 255.255.255.0 172.31.2.1Idaho(config)# ip route 0.0.0.0 0.0.0.0 s0Idaho(config)# ip route 172.31.2.0 255.255.255.0 172.31.2.2Utah(config)# ip route 172.31.3.0 255.255.255.0 172.31.2.1Utah(config)# ip route 172.31.3.0 255.255.255.0 s1Utah(config)# ip route 0.0.0.0 0.0.0.0 s021. Which statement about datagram life is true?Each router increments the TTL value of the datagram until the maximum hop count of the routing protocol is reached. The packet is then returned to the source.The packet is dropped when the router count and the TTL value match. The source is notified that transmission has failed.Each router decreases the TTL value by one until it reaches zero. The datagram is then discarded and a time exceeded for message is sent to the source.The destination device discards the datagram if the TTL value is zero on arrival. An ICMP destination unreachable message is sent back to the source.22.The following access list has been created to prevent traffic from host 204.204.7.122 from accessing the 201.100.11.0 network.access-list 22 deny host 204.204.7.122access-list 22 permit anyWhich group of commands will properly place this access list so that this host is denied access only to the 201.100.11.0 network?RouterA(config)# interface s0/0RouterA(config-if)# ip access-group 22 inRouterA(config)# interface s0/0RouterA(config-if)# ip access-group 22 outRouterA(config)# interface fa0/0RouterA(config-if)# ip access-group 22 inRouterB(config)# interface fa0/0RouterB(config-if)# ip access-group 22 inRouterB(config)# interface s0/0RouterB(config-if)# ip access-group 22 inRouterB(config)# interface fa0/0RouterB(config-if)# ip access-group 22 out23. A network administrator can establish a remote session to a host using the Router> telnet 192.168.1.1command but is unsuccessful when using the Router> telnet Boston command to connect to the same interface. Which of the following could be the problem? (Choose two.)The ip host table on the router is not configured.The command telnet Boston was issued from the wrong router prompt.The routing table is missing.Domain name services are not available.24. Which of the following are functions of a router? (Choose three.)packet switchingextension of network segmentssegmentation of local area networksselection of best path based on a logical addressingselection of best path based on a physical addressingThe commands shown in the graphic were entered to alter the startup sequence of the router. On the next reload, which IOS will be loaded?The router will load c2500-js-l.112-26d.The router will load c2500-d-l.120-9.The router will load the IOS from ROM.The router will boot into ROM monitor mode.26.A network administrator trying to deny Telnet traffic from the 192.5.5.0 network to the 201.100.11.0 network entered the commands shown in the graphic. When monitoring the network, the administrator noticed that Telnet packets were still passing between those networks. What is the cause?The router ignored this type of traffic because it required a standard access list to be configured instead of an extended one.The wrong port was configured for the ACL so Telnet traffic was still allowed.The access list has not been assigned to an interface.The permit ip any any allowed all traffic to pass regardless of the other statements listed in this ACL.Refer to the network graphic. A packet needs to travel from Router F to Router A. Which path would be selected by the RIP routing protocol if the default metrics are used?F, G, E, D, B, AF, E, D, C, AF, E, D, AF, E, D, B, A28. Which of the following is the correct flow of routines for a router startup?load bootstrap, load IOS, apply configurationload bootstrap, apply configuration, load IOSload IOS, load bootstrap, apply configuration, check hardwarecheck hardware, apply configuration, load bootstrap, load IOS29. In the configuration register value 0×2104, which value represents the boot field setting?x2430. ACL statements operate in sequential, logical order. If a condition match is true, the rest of the ACL statements are not checked. If all of the ACL statements are unmatched, what happens to the packet?The packets will be placed in a buffer and forwarded when the ACL is removed.The packets will be sent to the source with an error notification message.The implicit permit any statement placed at the end of the list will allow the packets to flow through uninhibited.The implicit deny any statement placed at the end of the list will cause the packets to be dropped.31. Which of the following would cause the "Message Of The Day" banner to appear? (Choose three.)telnetting into the routerinitiating a debug sessionconfiguring a router for the first timeusing the Aux port to check the current configurationusing the console port to check the current configuration32.The administrator knows that port E0 on router B connects to a small LAN without any routers. Which command can be executed on router B to conserve bandwidth on port E0?no update timersholdown-timer 96poison reverse E0passive-interface E0no triggered updates33. When must a router serial interface be configured with the clock rate command?when the interface is functioning as a DTE devicewhen the interface timers have been clearedwhen the connected DTE device is shut downwhen the interface is functioning as a DCE device34. What are the major characteristics of a wide area network? (Choose three.)connect devices separated by wide geographical areasincludes technologies of FDDI and Ethernetuses serial connections to access bandwidthcommon carriers are needed for connectionstype of connection between a router and a switch35. If the config-register on a router is set to 0×2102, where is the first place the router will look for boot system commands?RAMROMFlashNVRAM36. Why would an administrator use the Telnet application when troubleshooting a network? (Choose three.)It can be used to verify the operation of application layer software between the source and destination.Telnet can use the ICMP protocol to verify a hardware connection and network layer address.It is the most complete testing mechanism available.Remote networks may be accessed via a Telnet session for troubleshooting.Time to Live values are used by Telnet to identify a failure of device between source and destination.37.The network shown in the graphic is using RIP as the routing protocol. Which of the following are true regarding the network discovery process that will occur for this network? (Choose three.)The Palm Beach router will show networks 192.168.7.0 and 192.168.8.0 as directly connected networks.All of the routers will have direct knowledge of the exact topology of the entire network.The Key West router will forward routing table information to the Miami and Palm Beach routers.The Miami router will learn about network 192.168.1.0 from the Key West router.If network 192.168.4.0 becomes unavailable, the Key West router will notify the other routers of this fact in the next update.38. Which of the following are characteristics of the Open Shortest Path First (OSPF) routing protocol? (Choose two.)functions as a link-state routing protocoldiscards packets when the hop count is greater than 15calculates the shortest path to a destination using the Diffused Update Algorithm (DUAL)created as a proprietary routing protocolfloods updates as topology changes occurbroadcasts routing updates every 90 seconds or as triggered by topology changes39. The following line was displayed in the output of the show ip route command.R 192.168.3.0/24 [120/3] via 192.168.2.2, 00:00:30, Serial0/0What is the value of the routing metric?312203012040.Refer to the output from the show ip route command. What can be concluded from the output of this router command?A preferred route to the destination has not been set.There are two equal cost paths to network 1.0.0.0.Both interfaces are being used equally to route traffic.A variance must be set to load-balance across multiple paths.41. Which of the following are true statements about creating and applying access lists? (Choose three.)Access list entries should filter in the order from general to specific.One access list per port per protocol per direction is permitted.Standard ACLs should be applied closest to the source while extended ACLs should be applied closest to the destination.There is an implicit deny at the end of all access lists.Statements are processed sequentially from top to bottom until a match is found.The inbound keyword refers to traffic entering the network from the router interface where the ACL is applied.42. Which of the following are true regarding the setup configuration mode? (Choose three.)To abort the setup mode, use the CTRL+SHIFT+6 keys.To abort the setup mode, use the CTRL+C keys.Setup mode allows a complete configuration of the router.To enter setup mode, use the privileged mode setup command.A router that does not find a valid IOS during the boot process will start the system configuration dialog.A router that does not find a valid configuration file during the boot process will start the system configuration dialog.43. Which of the following are necessary for basic network communication to occur between hosts that will run such applications as Telnet, web browsers, and e-mail? (Choose three.)TCP/IP must be installed and properly configured on each device.Multiple subnets must be configured on the router to ensure accurate delivery.A default gateway must be configured for datagrams to travel outside of the LAN.The hosts must be directly connected to a switch to travel outside of the LAN.To ensure accurate delivery, a router must be configured and accessible by hosts on the network.44.Given the above topology, which of the following statements are true? (Choose two.)If RouterC receives a packet destined for 10.5.183.46, it will be forwarded out interface Serial 1.If RouterA receives a packet destined for 192.168.3.146, it will be forwarded out interface Ethernet 0.If RouterA receives a packet destined for 10.5.27.15, it will be forwarded out interface Serial 1.If RouterB receives a packet destined for 10.5.27.83, it will be forwarded out interface Serial 0.If RouterA receives a packet destined for 172.16.55.101, it will be forwarded out interface Serial 1.45. Host name resolution allows for the use of an alphanumeric name to identify network devices. Select the answer that displays the correct configuration syntax for creating a host name.Router# ip host Fontana 200.100.50.5Router(config)# ip host Fontana 200.100.50.5Router(config-if)# ip host Fontana 200.100.50.5Router(config)# ip host Fontana 200.100.50.5/24。

CCNA 4 - Final Exam (B)Posted by beotron at 9:23 PM1. Identify the factors that contribute to congestion on an Ethernet LAN. (Choose three.)• improper placement of enterprise level servers• addition of hosts to a physical segment• replacement of hubs with workgroup switches• increasing use of bandwidth intensive network applications• migration to full-duplex Ethernet within the LAN2. Which of the following are examples of TCP/IP application layer protocols? (Choose three.)• a terminal emulation protocol that supports remote console connections with various network devices • a protocol created by IBM that makes it easier for mainframes to connect t o remote offices• a protocol responsible for transporting electronic mail on TCP/IP networks and the Internet• a protocol that controls the rate at which data is sent to another computer• a protocol that exchanges network management information between a network device and a management console3. Which of the following eliminates switching loops?• hold-down timers• poison reverse• spanning tree protocol• time to live• split horizon protocol4. The show cdp neighbors command is a very useful network troubleshooting tool. Using the output in the graphic, select the statements that are true. (Choose two.)• CDP operates at the network layer of the OSI model.• The output of this command displays information about directly connected Cisco devices only.• The switch is attached to the SanJose1 FastEthernet0/21 interface.• SanJose1 is running CDP version 12.0.• SanJose1 has two fully operational, cdp-enabled Cisco switches directly connected to it.• SanJose2 is a 2600 series router running several routed protocols5. A network administrator can ping the Denver router, but gets a ‘Password Required but None Set’ message when trying to connect remotely via Telnet. Which command sequence must be applied to the Denver router to allow remote access?• Router(c onfig)# line console 0Router(config-line)# loginRouter(config-line)# password cisco• Router(config)# line vty 0 4Router(config-line)# loginRouter(config-line)# password cisco• Router(config)# line virtual terminalRouter(config-line)# enable loginRouter(config-line)# password cisco• Router(config)# line vty 0 4Router(config-line)# enable secretRouter(config-line)# password ciscoRouter(config)# enable secret ciscoRouter(config)# enable cisco6. Which of the following is associated with link-state routing protocols?• low processor overhead• poison reverse• routing loops• split horizon• shortest-path first calculations7. A router does not load its configuration after a power failure. After running the showstartup-configuration command, the adminstrator finds that the original configuration is intact. What is the cause of this problem?• The configuration register is set for 0×2100.• The configuration register is set for 0×2101.• The configuration register is set for 0×2102.• The configurati on register is set for 0×2142.• Boot system commands are not configured.• Flash memory is empty causing the router to bypass the configuration in NVRAM• Nederst på formularen8. Which commands are used to verify the content and placement of access control lists? (Choose three.) • show ip interface• show ip route• show processes• show running-config• show cdp neighbor• show access-lists9. Which of the following are required when creating a standard access control list? (Choose two.)• destination ad dress and wildcard mask• source address and wildcard mask• subnet mask and wildcard mask• access list number between 100 and 199 or 2000 and 2699• access list number between 1 and 99 or 1300 to 199910. Which of the following are keywords that can be used in an access control list to replace a dotted decimal wildcard mask? (Choose two.)• most• host• all• any• some• sum11. Refer to the diagram. All ports on Switch A are in the Sales VLAN and all ports on Switch B are in the Accounting VLAN. How many broadcast domains and how many collision domains are shown? (Choose two).• 3 collision domains• 3 broadcast domains• 5 broadcast domains• 9 collision domains• 10 collision domains• 13 collision domains12. Refer to the graphic. Using the most efficient IP addressing scheme and VLSM, which address can be configured on one of the serial interfaces?• 192.168.16.63/27• 192.168.16.158/27• 192.168.16.192/27• 192.168.16.113/30• 192.168.16.145/30• 192.168.16.193/3013. What is the purpose of the Spanning Tree Protocol (STP)?• prevents Layer 2 loops• prevents routing loops on a router• creates smaller collision domains• creates smaller broadcast domains• allows Cisco devices to exchange routing table updates14. What is the purpose of a loopback address when using the OSPF routing protocol?• activates the OSPF neighboring process• ensures a persistent router ID for the OSPF process• provides a backdoor for connectivity during the convergence process• streamlines and speeds up the convergence pr ocess15. Which statement is true regarding states of the IEEE 802.1d Spanning Tree Protocol?• Ports are manually configured to be in the forwarding state.• Ports listen and learn before going into the forwarding state.• Ports must be blocked before the y can be placed in the disabled state.• It takes 15 seconds for a port to go from blocking to forwarding16. Which sequence of commands is used to configure a loopback address on a router?• Router1(config)# interface loopback 1Router1(config-if)# ip address 192.168.1.1Router1(config)# interface serial 0/0• Router1(config-if)# loopback 1Router1(config-if)# ip address 192.168.1.1Router1(config)# interface serial 0/0• Router1(config-if)# loopback 1Router1(config-if)# ip address 192.168.1.1 255.255.255.0• Router1(config)# interface loopback 1Router1(config-if)# ip address 192.168.1.1 255.255.255.25517. Which routing protocols are classful and do not support VLSM? (Choose two.)• EIGRP• OSPF• RIP v1• RIP v2• IGRP18. Refer to the graphic. Two switches are connected together through a trunk port. SW2 displays the message shown. Which of the following will solve the duplex mismatch?• SW1(config)# interface fastethernet 0/1SW1(config-if)# duplex full• SW1(config)# interface fastethernet 0/1SW1(config-if)# full-duplex• SW2(config)# interface fastethernet 0/1SW2(config-if)# duplex full• SW2(config)# interface fastethernet 0/1SW2(config-if)# full-duplex19. Refer to the graphic. Two routers have been configured to use EIGRP. Packets are not being forwarded between the two routers. What could be the problem?• EIGRP does not support VLSM.• The routers were not configured to monitor neighbor adjacency changes.• The default bandwidth was used on the routers.• An incorrect IP address was configured on a router interface.20. According to the the provided router output, which of the following statements is true regarding PPP operation?• Only the link-establishment phase completed successfully.• Only the network-layer phase completed successfully.• Neither the link-establishment phase nor the the network-layer phase completed successfully.• Both the link-establishment and network-layer phase completed successfully21. Frame Relay is configured over a point-to-point connection between two routers. The output of the show frame-relay pvc command indicates that the status of this PVC is inactive. Which of the following devices could be the source of the problem? (Choose two.)• local router• local Frame Relay switch• remote router• remote Frame Relay switch• R3 has the following configuration:• R3# show running-config• –some output text omitted–• interface serial0/0• bandwidth 128• ip address 192.168.11.2 255.255.255.0• encapsulation frame-relay• frame-relay map ip 192.168.11.2 30 broadcast22. After the command R3# debug frame-relay packet is executed, a ping is issued from R3 to R1 but is unsuccessful. Based on the output of the debug command shown in the graphic and the router configuration, what might be problem?• No clock rate assigned.• There is an incorrect DLCI number in the map statement.• An incorrect IP address exists in the map statement.• The encapsulation command is missing the broadcast keywor d23. Which statements are true regarding the Frame Relay LMI? (Choose three.)• The LMI provides a virtual circuit (VC) status mechanism.• The LMI type must always be manually configured.• The available LMI types are NI1, DMS100 and 5ESS.• The LMI types supported by Cisco routers are CISCO and IETF.• The LMI type configured on the router must match the one used on the Frame Relay switch.• The LMI uses reserved DLCIs to exchange messages between the DTE and DCE24. Which statement describes the process that occurs in Network Address Translation (NAT) overloading?• Multiple private IP addresses are mapped to one public IP address.• The number of usable addresses assigned to a company is divided into smaller manageable groups.• A pool of IP addres ses are mapped to one or more MAC addresses.• The router acts as a DHCP server and assigns multiple public IP addresses for each private IP address configured25. Which two statements are true about the committed information rate on a Frame Relay link? (Choose two.)• The sum of the CIRs for all PVCs must be less than the port speed.• The sum of the CIRs for all PVCs must equal the port speed.• The sum of the CIRs for all PVCs can be greater than the port speed.• The DE bit will be set on frames that ar e transmitted in excess of the CIR.• Frames that are transmitted at greater than the CIR will be discarded at the source.• It is impossible to transmit frames at a rate in excess of the CIR26. Which of the following commands would be used to troubleshoot the processing of call control functions such as call setup, signaling, and termination?• show interface bri0/0• show isdn active• debug isdn q921• debug isdn q931• debug ppp negotiation• debug ppp authentication27. Which of the following statements are true regarding PPP? (Choose three.)• PPP can use synchronous and asynchronous physical media.• PPP can only be used between two Cisco devices.• PPP carries packets from several network layer protocols in LCPs.• PPP uses LCPs to establish, config ure, and test the data link connection.• PPP uses LCPs to agree on format options such as authentication, compression, and error detection28. A network administrator is evaluating authentication protocols for a PPP link. Which of the following reasons might lead to the selection of CHAP over PAP as the authentication protocol? (Choose three.) • establishes identities with a two-way handshake• uses a three-way authentication periodically during the session to reconfirm identities• control by the remote h ost of the frequency and timing of login events• transmits login information in encrypted format• uses an unpredictable variable challenge value to prevent playback attacks• makes authorized network administrator intervention a requirement to establish each session29. Why are static routes often used with ISDN DDR?• They are more stable than dynamic routing protocols.• They are more accurate than dynamic routing protocols because they are put in by a network administrator.• They are easier to modify when a faster technology is installed.• They prevent the unnecessary activation of the link30. Assuming that four bits have been borrowed to make subnets, identify the subnet network addresses. (Choose three.)• 192.168.14.8• 192.168.14.16• 192.168.14.24• 192.168.14.32• 192.168.14.148• 192.168.14.20831. A switch can be configured for three different forwarding modes based on how much of a frame is received before the forwarding process begins. Each of the numbered arrows in the accompanying graphic signifies the point in a frame where a particular forwarding mode will begin. Which one of the following groups reflects the sequence of forwarding modes signified by the numbered arrows?• 1) fast forward• 2) fragment free• 3) store-and-forward• 1) sto re-and-forward2) fragment free3) fast forward• 1) fragment free2) fast forward3) store-and-forward• 1) fast forward2) store-and-forward3) fragment free32. Which of the following commands will display a communication message on a router before the router prompt is shown?• banner motd * Property of TLC. UNAUTHORIZED USERS WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW. *• message Property of TLC. UNAUTHORIZED USERS WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW.• banner * Property of TLC. UNAU THORIZED USERS WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW. *• hostname (Property of TLC. UNAUTHORIZED USERS WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW.)• Øverst på formularen33. A router needs to be added to OSPF area 0. Which commands should be used to enable OSPF on the router? (Choose two.)• RouterA(config)# router ospf• RouterA(config)# router ospf 1• RouterA(config-router)# network 192.168.2.0 0.0.0.255 0• RouterA(config-router)# network 192.168.2.0 0.0.0.255 area 0• RouterA(config-router)# network 192.168.2.0 255.255.255.0 034. Refer to the graphic. Which of the following commands will configure router A for OSPF?• router ospf 1network 192.168.10.0• router ospf 1network 192.168.10.64 0.0.0.63 area 0network 192.168.10.192 0.0.0.3 area 0• router ospf 1network 192.168.10.64 255.255.255.192network 192.168.10.192 255.255.255.252• router ospf 1network 192.168.10.0 area 035. Which of the following protocols would exchange information between routers to share network addresses and their metrics?• TCP• RIP• CSMA/CD• Ethernet36. Which ISDN device can be directly connected to a two-wire local loop in a North American city?• a router with a serial interface• a router with an S/T interface• a router with a U interface• an ISDN terminal adapter37. The output of the show ip interfaces brief command indicates that Serial0 is up but the line protocol is down. Which of the following are possible causes for the line protocol being in the down state? (Choose two.)• The clock rate is not set on the DTE.• An incorrect default gateway is set on the router.• A network is missing from the routing protocol configuration.• The encapsulation on the Serial0 interface is incorrect.• Keepalives are not being sent by the remote device38. Which of the following is a characteristics of TCP? (Choose two.)• data transport reliability• best path determination• establishing, maintaining, and terminating virtual circuits• encapsulation of packets in a data frame with source and destination MAC addresses• best-effort datagram delivery39. Which statement is true regarding the command ip route 192.168.7.24 255.255.255.248 192.168.7.9? (Choose two.)• A packet destined for host 192.168.7.30 will be forwarded to address 192.168.7.9.• 192.168.7.9 i s the destination network for this route.• 192.168.7.24 is the next-hop router in this command.• This command is issued from the interface configuration mode.• This command is used to define a static route40. Which of the following application layer protocols use TCP? (Choose three.)• SMTP• FTP• SNMP• HTTP• TFTP• DHCP41. Which terms refer to Frame Relay congestion management mechanisms? (Choose three.)• BECN• DLCI• DE• FECN• LMI• Inverse ARP42. Which of the following router commands will verify that a path exists to a destination network?• Router# show ip interfaces brief• Router# show ip route• Router# show cdp neighbors• Router# show running-config• Router# show protocols43. When EIGRP is configured on a router, which table of DUAL information is used to calculate the best route to each destination router?• router table• topology table• DUAL table• CAM table• ARP table44. Refer to the graphic. Routers A and B have EIGRP configured and automatic summarization has been disabled on both routers. Which of the following commands is used on router A to summarize the attached routes, and to which interface is this command applied? (Choose two)• ip summary-address eigrp 1 192.168.10.64 255.255.255.192• ip area-range eigrp 1 192.168.10.80 255.255.255.224• summary-address 192.168.10.80 0.0.0.31• ip summary-address eigrp 1 192.168.10.64 0.0.0.63• serial interface on router A• serial interface on router B45. A router with two LAN interfaces, two WAN interfaces, and two loopback interfaces configured is operating with OSPF as its routing protocol. What is used by the OSPF process to assign the router ID? • the IP address of the interface configured with priority 0• the OSPF area ID configured on the interface with the highest IP addres s• the loopback with the highest IP address configured• the highest IP address on the LAN interfaces• the highest IP address configured on the WAN interfaces46. Given the IP address and subnet mask of 172.16.134.56 255.255.255.224, on which subnetwork does this address reside?• 172.0.0.0• 172.16.134.0• 172.16.134.32• 172.16.134.48• 172.16.134.47• 172.16.134.6347. Which commands show when the last IGRP routing update was received? (Choose two.)• Router# show ip protocols• Router# show version• Router# show interfaces• Router# show ip updates• Router# show ip route48. When using access control lists to filter traffic, which of the following is used to track multiple sessions occurring between hosts?• IP addresses• subnet masks• port numbers• routed protocols• routing protocols• interfaces49. Given the IP address and subnet mask of 172.16.134.64 255.255.255.224, which of the following would describe this address?• This is a useable host address.• This is a broadcast address.• This is a network address.• This is not a valid address50. The company network shown in the drawing has to be subnetted. The company has leased the ClassC IP address of 200.1.2.0. Which of the following network addresses and masks would be appropriate for one of the subnetworks?• 200.1.2.96 255.255.255.192• 200.1.2.160 255.255.255.224• 200.1.2.80 255.255.255.224• 200.1.2.32 255.255.255.240。

1请参见图示。

对于发往192.168.2.0 的数据包，R2 会采取什么操作？它会丢弃数据包。

它会通过S0/0/0 接口转发数据包。

它会通过Fa0/0 接口转发数据包。

它会将数据包转发给R1。

2请参见图示。

R1 会使用哪一总结地址来向R2 通告其网络？3请参见图示。

尽管R2 已配置正确，但主机A 还是无法访问Internet。

可以在R1 上配置哪两条可让主机A 访问Internet 的静态路由？（选择两项。

）ip route .0 0.0.0.0 Fa0/0ip route .0 0.0.0.0 Fa0/1ip routeip routeip route 209.165.202.0 255.255.255.0 .14请参见图示。

网络管理员已按图示配置了R1，并且所有接口都运作正常。

但从R1 ping 172.16.1.1 时失败。

造成此问题的原因可能是什么？R1 上的串行接口配置有误。

默认路由配置有误。

必须在R1 上发出default-information originate命令。

必须在R1 上禁用自动总结。

5请参见图示。

所有接口都已编址，并且运行正常。

网络管理员在主机A 上运行了tracert命令。

得到这种输出的原因可能是什么？（选择两项。

）主机A 缺少网关或配置不正确。

主机B 缺少网关或配置不正确。

R1 的路由表中缺少192.168.1.0/24 的条目。

R2 的路由表中缺少192.168.1.0/24 的条目。

R1 的路由表中缺少192.168.2.0/24 的条目。

R2 的路由表中缺少192.168.2.0/24 的条目。

6请参见图示。

从主机A 到主机B 的ping 成功，但从主机A ping 在Internet 上正常运行的主机却失败了。

此问题的原因是什么？R1 的快速以太网接口被禁用。

其中一条默认路由配置有误。

未在这两台路由器上配置路由协议。

主机A 上尚未配置默认网关。

7 网络管理员使用RIP 路由协议在一个自治系统内实施路由。

参加考试- DsmbISP Final Exam - CCNA Discovery: Working at a Small-to-Medium Business or ISP (版本4.1)剩余时间: 02:59:59正在显示第1 页，共4 页下一页>页: 1跳转<上一页1在图中所示的其中一台路由器上执行show ip route命令，显示下列输出：C 192.168.4.0/24 is directly connected, Serial0/0R 192.168.5.0/24 [120/1] via 192.168.4.2, 00:00:19, Serial0/0R 192.168.1.0/24 [120/2] via 192.168.3.1, 00:00:20, Serial0/1R 192.168.2.0/24 [120/2] via 192.168.3.1, 00:00:20, Serial0/1C 192.168.3.0/24 is directly connected, Serial0/1此命令是从哪一台路由器执行的？ABCD当NVRAM 中没有配置文件时，路由器将进入哪种模式？2ROMMON设置全局配置特权执行3最常用的外部路由协议是什么？BGPRIPOSPFEIGRP端口过滤和访问列表通过什么方式来增强网络安全？4防止特定类型的通信到达特定网络主机。

遭受各类拒绝服务攻击时提醒网络管理员。

防止病毒、蠕虫和特洛伊木马感染主机计算机和服务器。

可对机密数据通信进行加密和身份认证。

5显示配置文件时，哪两个命令可以确保允许访问特权执行模式的口令不以纯文本显示？（选择Router(config)# enable secret ciscoRouter(config)# enable ciscoRouter(config)# encryption-password allRouter(config)# enable login encryptedRouter(config)# enable password encryptionRouter(config)# service password-encryption192.168.17.111/28 属于哪一类地址？6主机地址网络地址广播地址组播地址7请参见图示。

1、最新CCNA第二学期Final(超强整合版)下What are two functions of a router? (Choose two.)It forwards data packets toward their destination.It forwards the packet to the destination if the TTL value is 0.It changes the destination IP address of data packets before forwarding them to an exit interface.It determines the best path based on the destination MAC address.It acts as an intersection between multiple IP networks.答案：AE2、Refer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load the start-up configuration settings.What could be the cause of this problem?There is insufficient NVRAM.There is insufficient flash memory.The configuration register is not configured with the default setting.The system image not located in NVRAM.答案：C3、Which router component contains a scaled-down version of the IOS that can be used to reload a complete version of the IOS in the event that the IOS becomes damaged or corrupted?ROMFlashSDRAMNVRAM答案：A4、Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. What is the result of adding this command?This route is automatically propagated throughout the network.The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.A static route is established.The traffic for all Class C networks is forwarded to 172.16.1.2.答案：C5、Refer to the exhibit. How many routes are ultimate routes?3457答案：C6、Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network?ADCABCIt will load balance the traffic between ADC and ABCIt will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.答案：C7、Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.)10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/24答案：AF8、Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the routerhandle this packet?It will forward the packet via the FastEthernet0/0 interface.It will forward the packet via the Serial0/0/0 interface.It will forward the packet via the Serial0/0/1 interface.It will drop the packet.答案：C9、Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the value that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.答案：C10、When presented with multiple valid routes to a destination, what criteria does a router use to determine which routes to add to the routing table?The router selects the routes with the best metric. All routes that have the same best metric areThe router first selects routes with the lowest administrative distance. The resulting routes are thenThe router selects the routes with the lowest administrative distance. All routes with the same lowestThe router installs all routes in the routing table but uses the route with the best metric most when答案：B11、A router has learned two equal cost paths to a remote network via the EIGRP and RIP protocols. Bothprotocols are using their default configurations. Which path to the remote network will be installed in therouting table?the path learned via EIGRPthe path learned via RIPthe path with the highest metric valueboth paths with load balancing答案：A12、Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.答案：AD13、Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)The route to network 172.16.0.0 has an AD of 156160.Network 192.168.0.16 can best be reached using FastEthernet0/0.The AD of EIGRP routes has been manually changed to a value other than the default value.Router1 is running both the EIGRP and OSPF routing process.Network 172.17.0.0 can only be reached using a default route.No default route has been configured.答案：CDFRefer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge答案：AB15Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?10.1.1.110.1.1.2172.16.1.1192.168.1.1答案：D16、Refer to the exhibit. A network administrator accesses router R1 from the console port to configure a newly connected interface. What passwords will the network administrator need to enter to make the connection and the necessary configuration changes?the Cisco123 password onlythe Cisco789 password onlythe Cisco001 password onlythe Cisco001 password and the Cisco789 passwordsthe Cisco001 password and the Cisco123 passwords答案：D17、When connecting two devices, which situation would normally require the use of a crossover cable?connecting a host to a switchconnecting a switch to a routerconnecting a switch to a switchconnecting a host to a router console port答案：C18、Refer to exhibit. A company network engineer enters the following commands in the routers:R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1When the engineer enters the show ip route command on R1, the routing table does not display the static route to the 10.1.1.0 network. All R1 and R2 interfaces are correctly addressed per the graphic. What is a logical next step that the engineer could take in order to make the static route display in the routing table in R1?Enter default routes in R1 and R2.Enable the R1 and R2 serial interfaces.Configure the static route to use an exit interface instead of a next-hop address.Enter the copy run start command to force the router to recognize the configuration.答案：B19、Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.)The command was run on the router.ABCD is a non- CISCO device.Layer 3 connectivity between two devices exists.ABCD supports routing capability.ABCD is connected to the Fa0/0 interface of the neighboring device.答案：AE20、Refer to the exhibit. The network administrator has run the following command on R1.R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2What is the result of running this command?Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.This route is automatically propagated throughout the entire network.Traffic for all networks is forwarded to 172.16.1.2.The command invokes a dynamic routing protocol for 192.168.2.0.答案：A21、The network administrator configures the router with the ip route 172.16.1.0 255.255.255.0 172.16.2.2 command. How will this route appear in the routing table?C 172.16.1.0 is directly connected, Serial0/0S 172.16.1.0 is directly connected, Serial0/0C 172.16.1.0 [1/0] via 172.16.2.2S 172.16.1.0 [1/0] via 172.16.2.2答案：D22、Refer to the exhibit. The command ip route 0.0.0.0 0.0.0.0 S0/0/0 is run on router R2. What are the two results of this command? (Choose two.)A static route will be updated in the routing table.The traffic from the Internet will be directed to R2.The traffic from the source network 172.16.0.0/22 will be blocked.The route will be specified as the default route for all networks not defined in the routing table.All the broadcasts will be forwarded via the S0/0/0 interface of R2.答案：AD23、Refer to the exhibit. Hosts on the 192.168.1.0 network cannot communicate with hosts on the 172.16.1.1 network. The network administrator has run the show ip route command on R1.What could be the cause of this problem?The FastEthernet interface on R1 is disabled.Autosummarization is enabled on R1.The serial interface S0/0/0 of R1 is administratively down.No static route or routing protocol is configured.答案：D24、A company i s using static routes that are configured with an administrative distance of “1” on all routers in the network. The network administrator decides to introduce a dynamic routing protocol to reduce the manual configurations for the static routes. Which option identifies the correct procedure for the dynamic routing to take place in the network?The static routes and the dynamic routes will have the traffic alternate between them.The static routes will be automatically removed once the dynamic routing is configured.The static routes will be automatically updated with the next hop IP address once the dynamicThe static routes must be manually removed from all routers in order for the dynamic routes to be答案：D25、Refer to the exhibit. An administrator is adding a new subnet of 50 hosts to R3. Which subnet address should be used for the new subnet that provides enough addresses while wasting a minimum of addresses?192.168.1.0/24192.168.1.48 /28192.168.1.32/27192.168.1.64/26答案：D26、Refer to the exhibit. What summarization should R2 use to advertise its LAN networks to R1?172.16.0.0/24172.16.4.0/22172.16.4.0/23172.16.4.0/24答案：B27、Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?The IP address of host A is incorrect.The default gateway of host A is incorrect.The Fa0/1 interfaces of the two routers are configured for different subnets.The subnet mask for the Fa0/0 interface of R1 is incorrect.答案：C28、Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?host Ahost Bhost Chost D答案：B29、A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 2000 hosts for local LANs. Which subnet mask should the administrator use to create the new subnets?255.255.224.0255.255.240.0255.255.248.0255.255.252.0答案：C30、How will a router that is configured with a classless routing protocol determine the subnet mask that should be assigned to routes that are learned from neighboring classless routers?The subnet mask that is included in the routing updates will be used.The subnet mask of the interface that receives the update will be used.The subnet mask that is specified in the network command will be used.The class of the network in the update will determine the subnet mask that is used.答案：A31、Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statements are true? (Choose three.)The missing information for Blank 1 is the command show ip route.The missing information for Blank 1 is the command debug ip route.The missing information for Blank 2 is the number 100.The missing information for Blank 2 is the number 120.The missing information for Blank 3 is the letter R.The missing information for Blank 3 is the letter C答案：ADF32、Which statement correctly describes a feature of RIP?RIP is a link-state routing protocol.RIP uses only one metric—hop count— for path selection.Advertised routes with hop counts greater than 10 are unreachable.Messages are broadcast every 10 seconds.答案：B33、Refer to the exhibit. The network is using the RIPv2 routing protocol. If network 10.0.0.0 goes down, what mechanism will prevent Router1 from advertising false routing information back to Router2?triggered updatespoison reverseholddown timerssplit horizon答案：D34、Refer to the exhibit. While trying to diagnose a routing problem in the network, the network administrator runs the debug ip rip command. What can be determined from the output of this command?The router is broadcasting RIP updates.The router will be unable to ping 192.168.1.2.The router is directly connected to network 172.16.1.0 /24.The router has two interfaces that participate in the RIP process.答案：D35、Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configured and operational. Both routers are configured to include all connected interfaces in routing updates. R2 is not showing any routes from R1 in the routing table. What is the likely cause?The adjacent interfaces are passive.The distance of 120 exceeds 15 hops.R2 will not accept version 1 updates from R1.答案：C36、Refer to the exhibit. When the show cdp neighbors command is issued from router C, which devices will be displayed in the output?B, DA, B, DD, SWH-2SWH-1, A, BSWH-1, SWH-2A, B, D, SWH-1, SWH-2答案：A37、Refer to the exhibit. The routers in the exhibit are running the EIGRP routing protocol. What statement is true regarding how packets will travel from the 172.16.1.0/16 network to the 192.168.200.0/24 network?The router chooses the first path that it learned and installs only that route in the routing table.The router chooses the path with the lowest administrative distance and installs only that route in the routing table.The router chooses the highest routing ID based on the advertised network IP addresses and installs only that route in the routing table.The router installs all the equal cost paths in the routing table but sends packets out only one, holding the others in reserve in case the primary route goes down.The router installs all the equal cost paths in the routing table and performs equal cost loadbalancing to send packets out multiple exit interfaces.答案：E38、Which three statements describe the operation of routing with EIGRP? (Choose three.)As new neighbors are discovered, entries are placed in a neighbor table.If the feasible successor has a higher advertised cost than the current successor route, then it becomes the primary route.If hello packets are not received within the hold time, DUAL must recalculate the topology.The reported distance is the distance to a destination as advertised by a neighbor.EIGRP maintains full knowledge of the network topology in the topology table and exchanges full routing information with neighboring routers in every update.EIGRP builds one routing table that contains routes for all configured routed protocols.答案：ACD39、Which statement correctly describes a feasible successor in EIGRP?It is a primary route that is stored in the routing table.It is a backup route that is stored in the routing table.It is a primary route that is stored in the topology table.It is a backup route that is stored in the topology table.答案：D40、Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor adjacency.What action should be taken to solve this problem?Enable the serial interfaces of both routers.Configure EIGRP to send periodic updates.Configure the same hello interval between the routers.Configure both routers with the same EIGRP process ID.答案：D41、Refer to the exhibit. What information can be determined from the displayed output?EIGRP packets are waiting to be sent to the neighbors.The adjacencies between the routers are yet to be established.The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2S0/0/1 interface.答案：D42、Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)All routes are stable.Each route has one feasible successor.The serial interface between the two routers is down.The administrative distance of EIGRP has been set to 50.The show ip eigrp topology command has been run on R1.答案：AE43、Refer to the exhibit. R2 is configured correctly. The network administrator has configured R1 as shown. Which two facts are true about the forwarding of route information by R1? (Choose two.)R1 will forward the route information for subnet 192.168.100.0/30.R1 will not forward route information for subnet 192.168.100.4/30.R1 will forward the route information with an administrative distance set to 50.R1 will forward the summarized route information for network 192.168.100.0/24.R1 will forward route information for subnet 10.10.10.0/30 out the serial interface.答案：AB44、Refer to the exhibit. A network administrator is trying to determine why router JAX has no OSPF routes in its routing table. All routers are configured for OSPF area 0. From the JAX router, the administrator is able to ping its connected interfaces and the Fa0/1 interface of the ORL router but no other router interfaces. What is a logical step that the network administrator should take to troubleshoot the problem?Reboot the routers.Change the OSPF process ID on all of the routers to 0.Check to see if the cable is loose between ORL and JAX.Check to see if CDP packets are passing between the routers.Use show and debug commands to determine if hellos are propagating.答案：E45、Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. Which set of commands is required to configure a single area OSPF for the networks that are connected to R2?R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 1答案：A46、Refer to the exhibit. A network administrator has configured OSPF using the following command:network 192.168.1.32 0.0.0.31 area 0Which router interface will participate in OSPF?FastEthernet0/0FastEthernet0/1Serial0/0/0Serial0/0/1答案：C47、What is the function of the OSPF LSU packet?used to confirm receipt of certain types of OSPF packetsused to establish and maintain adjacency with other OSPF routersused to request more information about any entry in the BDRused to announce new OSPF information and to reply to certain types of requests答案：D48、Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)the same process IDthe same area IDnetwork addresses and wildcard masksthe same router IDthe same loop back address答案：BC49、Refer to the exhibit. OSPF is used for the routing protocol and all interfaces are configured with the correct IP addresses and subnet masks. During testing, it is found that router R1 is unable to form an adjacency with R2. What is the cause of this problem?Both routers have been configured with incorrect router IDs.Both routers have been configured in different OSPF areas.Both routers have been configured with an incorrect network type.Both routers have been configured with different hello and dead intervals.答案：D50、Refer to the exhibit. The IP addresses on all interfaces on router R1 were configured before the OSPF protocol had been enabled on the router. No OSPF router ID was manually configured. Which IP address will be selected by the router as an OSPF router ID?10.10.10.1172.16.1.1172.16.2.1192.168.1.1192.168.100.1答案：AExam Viewer - ERouting Final Exam - CCNA Exploration: Routing Protocols and Concepts (Version 4.0)Below you will find the assessment items as presented on the exam as well as the scoring rules associated with the item.Use of the exam information in the Exam Viewer is subject to the terms of the Academy Connection Website Usage Agreement between you and Cisco. The purpose of the Exam Viewer is to support instruction while not compromising exam security for other Cisco Networking Academies or students.This material should not be distributed outside a proctored and controlled setting. If misuse is found,action will be taken to limit access to assessment content. Please remember to logout and close your browser window after using the Exam Viewer.1Using default settings, what is the next step in the router boot sequence after the IOS loads from flash?Perform the POST routine.Search for a backup IOS in ROM.Load the bootstrap program from ROM.Load the running-config file from RAM.Locate and load the startup-config file from NVRAM.Scoring Rule For: correctness ofresponseThis item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.1.4 Router Boot-up Process2 A router boots and enters setup mode. What is the reason for this?The IOS image is corrupt.Cisco IOS is missing from flash memory.The configuration file is missing from NVRAM.The POST process has detected hardware failure.Scoring Rule For: correctness ofresponseThis item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.1.4 Router Boot-up Process3Which two router component and operation pair are correctly described? (Choose two.)DRAM - loads the bootstrapRAM - stores the operating systemFlash - executes diagnostics at bootupNVRAM - stores the configuration fileROM - stores the backup configuration filePOST - runs diagnostics on hardware modulesScoring RuleFor: correctness of responseOption 4 andOption 6 arecorrect.1 point for eachcorrect option.0 points if moreoptions areselected thanrequired.Max Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.1.2 Router CPU and Memory4Refer to exhibit. Given the topology shown in the exhibit, what three commands are needed to configure EIGRP on the Paris router? (Choose three.)Paris(config)# router eigrp 100Paris(config)# router eigrpParis(config-router)# network 192.168.6.0Paris(config-router)# network 192.168.7.0Paris(config-router)# network 192.168.8.0Paris(config-router)# network 192.168.9.0Scoring Rule For: correctness ofresponseOption 1, Option 4, and Option 5are correct.1 point for each correct option.0 points if more options areselected than required.Max Value = 3This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts•9.2.4 The network Command5Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that interface Fa is not functioning. Which action will most likely correct the problem with FastEthernet0/1?A clock rate should be added to the interface configuration.The subnet mask should be added to the interface configuration.An interface description needs to be added to the interface configuration.The no shutdown command needs to be added to the interface configuration.Scoring Rule For: correctness ofresponse2 points for Option 40 points for any other optionThis item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.2.2 Basic Router Configuration6Which routing protocol maintains a topology table separate from the routing table?IGRPRIPv1RIPv2EIGRPScoring Rule For: correctness ofresponseThis item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts•9.1.1 EIGRP: An Enhanced Distance Vector Routing Protocol7Which statement is true about the metrics used by routing protocols?A metric is a value used by a partiA common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.Scoring Rule For: correctness ofresponse2 points for Option 10 points for any other optionMax Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 3.3.1 Purpose of a Metric8Refer to the exhibit. All interfaces are addressed and functioning correctly. The network administrator runs the tracert comma Which two facts could be responsible for the output of this command? (Choose two.)The gateway for Host A is missing or improperly configured.The gateway for Host B is missing or improperly configured.The entry for 192.168.1.0/24 is missing from the routing table of R1.The entry for 192.168.1.0/24 is missing from the routing table of R2.The entry for 192.168.2.0/24 is missing from the routing table of R1.The entry for 192.168.2.0/24 is missing from the routing table of R2.Scoring Rule For: correctness ofresponseOption 4 and Option 5 are correct.1 point for each correct option.0 points if more options are selectedthan required.Max Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 2.7.2 Troubleshooting a Missing Route9Refer to the exhibit. What information can be determined from the displayed output?EIGRP packets are waiting to be sThe adjacencies between the routers are yet to be established.The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interface.Scoring Rule For: correctness ofresponse2 points for Option 40 points for any other optionMax Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts•9.5.1 The Null0 Summary Route10Which phase of the router boot process involves running diagnostics on the hardware components from ROM?performing the POSTloading the bootstrap programlocating and loading the Cisco IOS softwarelocating and loading the startup configuration fileScoring Rule For: correctness ofresponse2 points for Option 10 points for any other optioMax Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.1.4 Router Boot-up Process11Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. W result of adding this command?This route is automatically propagated throughout the network.The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.A static route is established.The traffic for all Class C networks is forwarded to 172.16.1.2.Scoring Rule For: correctness of。

CCNA第二学期final - - 3（路由）1请参见图示。

Sales 网络中部署了一台新 PC。

它的主机地址为 192.168.10.31，默认网关为 192.168.10.17。

该 PC 无法与网络正常通信。

原因是什么？默认网关不正确。

该地址位于错误的子网中。

主机地址和默认网关设反了。

192.168.10.31 是该子网的广播地址。

下列关于链路状态路由协议的陈述，哪两项是正确的？（选择两项。

）链路状态路由协议了解整个网络的拓扑结构。

链路状态路由协议可以使大型网络快速达到收敛。

链路状态路由协议的路由更新中不包含子网掩码。

链路状态路由协议根据跳数从高到低的顺序来确定最佳路径。

链路状态路由协议不适合具有特定层次结构的网络。

链路状态路由协议仅向直连的邻居发送整个路由表。

2请参见图示。

排查网络故障时，理解各种路由器命令的输出非常重要。

根据图中显示的信息，下列哪三条叙述是正确的？（1 处缺少的信息为 show ip route 命令。

1 处缺少的信息为 debug ip route 命令。

2 处缺少的信息为数字 100。

2 处缺少的信息为数字 120。

3 处缺少的信息为字母 R。

3 处缺少的信息为字母 C。

3 OSPF 和 IS-IS 路由器在构建最短路径优先数据库时执行的第一个步骤是什么？获知直连网络发送 hello 以发现邻居并形成邻接关系选择后继路由器和可行后继路由器以传播拓扑表向所有邻居发送 LSP，通知它们所有已知的网络及其链路状态4网络管理员在所示网络图中的路由器 B 和 C 上启用了 RIP。

什么命令可防止向路由器 A 发送 RIP 更新？ A(config)# router ripA(config-router)# passive-interface S0/0B(config)# router ripB(config-router)# network 192.168.25.48 B(config-router)# network192.168.25.64 A(config)# router ripA(config-router)# no network 192.168.25.32B(config)# router ripB(config-router)# passive-interface S0/0A(config)# no router rip5IP 数据包报头中的 TTL 字段有什么作用？在无效计时器超时后从路由表中清除不可达路由防止定期更新消息错误地恢复可能已经出错的路由在清除计时器超时后从路由表中删除不可达路由限制数据包在被丢弃之前能够在网络中传输的时间长度或跳数用于在发往其它路由器的路由更新中将路由标记为不可达6如图所示的网络在路由流量时存在问题，怀疑这可能是编址方案所造成。