思科第三学期第六章答案

参加考试 - ESwitching Final Exam - CCNA Exploration: LAN 交换和无线 (版本 4.0)剩余时间正在显示第 1 页，共 4页下一页>页跳转<上一页1 以下哪项参数用于唯一标识一个无线网络，使其与其它网络区分开来？SSID OFDMWEPDSSS2 分层网络模型具有哪三项优点？（选择三项。

）带宽争用现象减少物理布局范围减小网络的容错能力提高无需配线间无需第三层功能管理和故障排除工作简化3在将 Catalyst 交换机迁移到其它 VTP 管理域之前，应该进行哪三项任务？（选择正确的 VTP 模式和版本。

使用新管理域的名称配置交换机。

从新域中的 VTP 服务器上下载 VTP 数据库。

配置新域内的 VTP 服务器，使其识别该交换机的 BID。

重置 VTP 计数器，使交换机可与新域内的其它交换机同步。

检验交换机的配置修订版号是否比新域内的其它交换机的低。

4下列哪两种说法正确地描述了生成树协议？（选择两项。

）它只在第 2 层使用。

它在交换机上配置。

它消除了网络拓扑中的第 2 层环路。

它限制了端口上所允许的有效 MAC 地址的数量。

它使 VLAN 信息得以传播到网络中的其它交换机。

5下列哪种方法可建立用于配置 Linksys WRT300N 无线接入点的管理连接？与接入点关联，然后与接入点建立超级终端会话。

以物理方式连接到接入点，然后重新启动计算机以启动配置软件。

在接入点所在的 IP 子网内的计算机上的 web 浏览器中输入接入点的默认修改与接入点连接的计算机的 TCP/IP 属性，使其与接入点处于同一个网机以建立连接。

6请参见图示。

源地址并非 0019.d2e4.d9f7 的帧进入接口 Fa0/24 时会发生什么情况？Fa0/24 会变为 error-disabled（错误-禁用）状态。

传入帧会被丢弃。

Fa0/24 端口 LED 会关闭。

安全违规计数会增加。

丫y1 下列冇关OSPFDR和BDR选举的说法中哪项正确？匚每次添加新的OSPF相邻设备时都会发生DR/BDR选举。

E 具有最高OSPF优先级设置的路由器会在DR选举中获胜。

C连接到多路访问网络的路由器的默认优先级值为0。

C 当使用默认优先级值时，具冇最高MAC地址的路由器会被选为DR。

2下列哪两项与帧中继OSPF点对多点环境有关？（选择两项。

）17不选举DRo厂OSPF优先级值决定了帧中继链路上的活动DRoV OSPF邻居路由器是静态定义的。

厂链路类型被标识为广播多路访问。

厂BDR的路由器ID比DR路由器ID更高。

之前Router# show ip r ＜省略部分输出〉Gateway of last re10.0.0.0/8isvaC 10.16.1.0/270 10.16.J64匚S 10.16.1.64/30 10.16,1?129.192.168.1.0/30C 192.168.1.00 192.168.1.4C 198.18.1.0/24请参见图示。

命令ip route 10.16.1.64 255.255.255.252 s0/0/0己输入路由器中。

为什么路由表中除网络10.16.1.64/27 ；E 路由器将10.16.1.64/30和10.16.1.64/27视为不同的网络。

C 静态路由用作发往10.16.1.64/27的数据包的备用路由。

C 静态路由的AD比OSPF路由的AD低。

匚静态路由度戢比网络10.16.1.64/27的OSPF度量低。

请参见图示。

黑体显示的值128有什么用途?E 它是OSPF开销度量。

C它是OSPF管理距离。

匚这是Dijkstra算法指定的值，表示以跳数为单位的网络距离。

匚它是分配给接口的值，DUAL算法使用该值来确定度量。

BDR请参见图示。

A 、B 、C 三台路由器属于现有的OSPF 网络。

路由器D 新加入网络。

所有路由器均运行 示的优先级。

在路由器D 刚加入现有网络的一刻，DR/BDR 状态如何？ C 会强制进行选举且路由器D 会在DR 选举中获胜。

第一章1 人们将 UDP 而不是 TCP 用于语音和视频通信的原因有哪两点？（选择两项。

） b cTCP 需要传输所有数据包，数据才可使用。

TCP 的确认过程引入了延时，这打断了数据流。

UDP 不具有重新传输丢失数据包的机制。

UDP 可以容许延时并相应进行补偿。

TCP 是一种无连接协议，可提供端到端可靠性。

UDP 是一种面向连接的协议，可提供端到端可靠性。

2 为什么 TCP 是用于传输数据文件的首选第 4 层协议？ a1TCP 比 UDP 更可靠，因为它要求重新传输丢失的数据包。

与 UDP 相比，TCP 对源主机和目的主机处理资源要求较低。

UDP 引入了延时，因此会降低数据应用程序的质量。

TCP 可确保快速传输，因为它无需排序或确认。

3 企业 IT 部门可使用哪两种解决方案来帮助远程工作人员访问内部网？（选择两项。

） a cVPNNAT用户身份验证客户端防火墙软件数据包嗅探4 Cisco 企业体系架构有什么用途？ b放弃三层层次模型，改用平面型网络方案将网络划分为功能组件，同时保持核心层、分布层和访问层的概念通过将多个组件整合在访问层的单个组件中，为核心层提供服务和功能通过将服务器群、管理服务器、企业内部网和电子商务路由器组合在同一层中，降低整体网络流量5 IDS 和 IPS 应该部署在 Cisco 企业体系架构的哪个功能区域内，才能检测和防止来自外部的恶意活动？ c企业园区WAN 与 Internet企业边缘服务提供商边缘6 拥有外联网有什么好处？ d它可专为员工提供类似 web 的访问方式以访问公司信息。

它可限制用户访问企业信息的方式，使其只能通过安全 VPN 或远程访问连接来访问。

它使客户和合作伙伴可通过连接到公共 web 服务器来访问公司信息。

它使供应商和承包商可通过受控的外部连接访问内部机密信息。

7 VoIP 可为远程办公提供什么功能？b高质量实时视频演示通过 Internet 进行实时语音通信同时共享桌面应用程序的能力通过 Internet 进行安全的加密数据传输8 Cisco 企业体系架构的哪个功能组件负责托管内部服务器？ a企业园区企业边缘服务提供商边缘建筑分布层9 在层次式设计模型中，哪项任务一般仅需要使用接入层的服务？ c连接到企业 web 服务器以更新销售数据在家中使用 VPN 向总部办公室服务器发送数据通过本地部门网络打印机打印会议日程向国外的商业机构拨打 VoIP 电话回复其它部门同事发来的电子邮件10 企业边缘处的设备有哪两项重要特征或功能？（选择两项。

1、E2、D3、BCD4、D5、E6、D7、C8、C9、C 10、B 11、BDE 12、D 13、AC 14、C 1 1C 17、B 18、ACD 19、B 20、BCD 21、BCF的才是正确答案EE请参见图示。

网络管理员发现主机 A 无法连接到Internet，但是服务器群的连接毫无问题。

此外，主机 A 完全可以连接到服务器群。

此问题可能出于什么原路由器的网关不正确。

主机A 的网络地址与其它地址重复。

主机A 配置的默认网关不正确。

主机A 的子网掩码不正确。

主机A 所在的网络需要NAT。

2请参见图示。

主机 A 连接到LAN，但无法访问Internet 上的任何资源。

主机的配置如图所示。

问题的原因可能是什么？E主机的子网掩码不正确。

默认网关为网络地址。

默认网关为广播地址。

默认网关与主机位于不同的子网。

3静态IP 地址建议分配给以下哪些网络设备？（选择三项。

）BCDLAN 工作站服务器网络打印机路由器远程工作站笔记本电脑4IPv4 地址由多少位组成？D1286448325路由器根据给定IP 地址和子网掩码来确定子网的网络地址时使用以下哪种运算过程？D二进制加法十六进制“与”运算二进制除法二进制乘法二进制“与”运算6请参见图示。

下列哪个网络前缀将使用图中显示的IP 编址方案？A/24/16/20/27/25/287主机172.25.67.99 /23 的二进制网络地址是什么？C10101100. 00011001.01000011.0000000010101100. 00011001.01000011.1111111110101100. 00011001.01000010.0000000010101100. 00011001.01000010.0110001110101100. 00010001.01000011. 0110001010101100. 00011001.00000000.00000000 8制定IPv6 的主要原因是什么？C安全性报头格式简化提高编址能力简化编址9请参见图示。

思科ITE第六章考试答案注：答案已经验证，均为正确，需要高清的请下载使用!IT Essentials （版本6.00） - ITE 第6 章1雹理员使用Windows 7的那亍功能可以将计算机配養为每天凌晨3:00删除硬盘驱动器中的临时文件？j；进豈酋理2 Windows 7和8中的哪项功能允许用户将鼠标移到任务栏的右边缘，临时查看已打幵的窗口后面的桌面？|| * Fe^k€ IS索U搐4到査❸ Snap3技术人员经常用于确定操作系统问题原因的一个常用步骤是什么?®在安全餌下启利桩问题忌否与驱赔序与芜J 测试电源.C检査甌淳接”幷确俣凤扇正當工作.■ 记录解决问鏈所用的时（亂4下列哪两个Windows实用程序可帮助您维护已怏时间正常使用的计算机上的礎盘？（选挥两项J-J 4S蛊蚩护-1雌沁-J刪怙曲t5应采取以下哪种预防性维护操件来帮助提高系统的安全性?对硬盘驱动壽拥曲s检查.■ 1对硬盘驰动器进行碎片整理，'•I目动运甸丈可病毒扫揺握序，'J疋期执行答份.6技术人员需要使用PC上的Windows操作蔡统所不支持的一个应用.技术人员如何让该应用在PC上运行？J 時用Windows'J吁专半禅弍T奇莽或由年*•I包庭一拟机「其中的蠟柞蹄站题用”咋再苣理笊再砂曳卄的稅限舞舷电7使用PC虚拟化的两个优势是什么？（选择两项Q□可通过虚拟化提升主机肘性能’U 它可实现网络威胁识别.®它可提供成本节省•□它可以保护主机免受病毒攻击。

7它允许在一台PC上同时运行多个撫作系紘8 Microsoft Virtual PC属于哪个类别的虚拟机监控程序?9将计筒机升JRflJ Windows 7 用户发现UAC （用户帐户控制）面板岀现得更加®緊・用户如何才能减少UAC出现的频率？B埜用户户桶面牺的话拆柯低UM：匹*打萍宵悖辽下申靳亦装所冇周戸程序*榔品卡旋檢为祎合Window 7剧氐顶住委求的品卡.在潅笊信总可工貝強和面恆时性蒂迭顶-对话惬中，荷捋调K^B<£tS£.10在Windows命令提示符下使用哪条命令可以计划某个程序在特定时间运行？TASKLIST® ATQ TASKKILL0 CMD门哪种Windows管理工具可以同时显示多种计算机资源的使用情况，并帮助技术人员确亍是否需要升级？回性館监孵・服芬镇驻4眼务号事呵宵看as23 TS软件工程师裁与了某个应用的研发工作*逬行可用性测试时.该工程师需要确保应出可同时在Winco^s 7和Wifido^s 0环境下正毎工彳仁必须住实际的黑作系旣臥觅下验证其特性和功能.工稈师便用的是Windows 11作站.哪两项技术可帮助工程师完成可用性测试？（选择两项■】」两个不同的CPU*血引导O两■?■不冋的連国□存储冗就13在帮助客户解决Windows问题时，下直哪个问题是可以使用的幵放式问题？o临近昆改过世码吗？0在计算削启朋，雌否販到莹录酝？⑥密就钱装了罄些程展了歸否能启肓押件丢統？14揶个Windows实用程厚允许Windows 7和8用户轻松快速地共享文悄口文件夹?*脂务* HcmeGraup诳备E為0層伽心15技术人员正在尝试修境一台WMows 了计算机，该计算机在加电自检后显示号I导盘无效”错误.此错误的可能原因是忡么？」ntdetecImm^d^l^dF* †boot Ini 交14期坏”3 nttOaw^ftJS坏.•JTBIOS中末汗确诳音后和阳庠+16哪个Windows I具允许管理员在一个位置组织计算机管理工具，以方便使用它们?■':忏許计划K序f*l Micrwnn薛订制台■-:陨务柠制台18对于每次计算机启动时都应运行的服务F必须选择哪种启动类型？•手动O启动•弓瞎®自动O幵姥*用户报告在安装了声音合成理库后「视频编辑程序无法正常工作。

1、OSPF 路由器始终需要什么才能共享路由信息？指定路由器备用指定路由器相邻关系NBMA 网络拓扑在网络 224.0.0.0 上配置的链路2、如果网络已达到收敛状态，则下列关于同一个 OSPF 区域内的每台路由器的链路状态数据库的说法中，哪些正确？各台路由器的链路状态数据库包含相同的状态信息。

各台路由器的链路状态数据库各不相同，具体内容取决于路由器在网络中的位置。

链路状态数据库存储在指定路由器中，供该区域内的每台路由器在需要时访问。

每台路由器的链路状态数据库仅包含与相邻路由器及其链路状态相关的信息。

3、请参见图示。

RTRC 刚配置完成，无法向 RTRB 发送正确的OSPF 路由，如 RTRB 的路由表所示。

根据 RTRC 配置，此问题最可能的原因是什么？RTRC 接口因管理原因被关闭。

RTRC 的 OSPF 进程 ID 与 RTRB 上的进程 ID 不符。

RTRC 的接口地址与网络中的其它地址重叠。

RTRC 的 OSPF 路由配置中有缺失或错误的 network 语句。

4、链路状态协议与距离矢量协议在路由计算方面的主要差异是什么？距离矢量协议采用来自相邻设备的现有路由，将其累加起来。

链路状态协议独立计算全部路由。

链路状态协议会计算完整的路由表并将其发送给相关区域内的所有路由器，而距离矢量协议不会。

当确定无效路由时，链路状态协议在计算所有路由时都使用水平分割。

而距离矢量协议使用毒性反转。

与链路状态协议相比，距离矢量协议计算路由时对 CPU 和内存的要求更高。

5、下列哪两种说法描述了链路状态路由协议的工作方式？（选择两项。

）达到收敛时，同一区域中的所有路由器都有等同的链路状态数据库。

通过运行扩散更新算法 (DUAL) 来防止路由环路。

链路状态路由器频繁发送整个路由表的定期更新。

可靠传输协议 (RTP) 用于发送和接收 LSA。

计算到达每个目的地的最短路径是通过 SPF 算法完成的。

6、请参见图示。

1Refer to the exhibit. Which three statements describe the network design shown in the exhib (Choose three.)This design will not scale easily.The router merges the VLANs into a single broadcast domain.This design uses more switch and router ports than are necessary.This design exceeds the maximum number of VLANs that can be attached to a switch.This design requires the use of the ISL or 802.1q protocol on the links between the switc router.If the physical interfaces between the switch and router are operational, the devices on th VLANs can communicate through the router.2 A router has two FastEthernet interfaces and needs to connect to four VLANs in the local netcan this be accomplished using the fewest number of physical interfaces without unnecessa decreasing network performance?Implement a router-on-a-stick configuration.Add a second router to handle the inter-VLAN traffic.Use a hub to connect the four VLANS with a FastEthernet interface on the router.Interconnect the VLANs via the two additional FastEthernet interfaces.3Refer to the exhibit. All devices are configured as shown in the exhibit. PC2 can successfully F0/0 interface on R1. PC2 cannot ping PC1. What might be the reason for this failure?R1 interface F0/1 has not been configured for subinterface operation.S1 interface F0/6 needs to be configured for operation in VLAN10.S1 interface F0/8 is in the wrong VLAN.S1 port F0/6 is not in VLAN10.4Refer to the exhibit. The commands for a router to connect to a trunked uplink are shown in tA packet is received from IP address 192.168.1.54. The packet destination address is 192.1What will the router do with this packet?The router will forward the packet out interface FastEthernet 0/1.1 tagged for VLAN 10.The router will forward the packet out interface FastEthernet 0/1.2 tagged for VLAN 60.The router will forward the packet out interface FastEthernet 0/1.3 tagged for VLAN 120.The router will not process the packet since the source and destination are on the same The router will drop the packet since no network that includes the source address is attac router.5 What distinguishes traditional routing from router-on-a-stick?Traditional routing is only able to use a single switch interface. Router-on-a-stick can use switch interfaces.Traditional routing requires a routing protocol. Router-on-a-stick only needs to route dire connected networks.Traditional routing uses one port per logical network. Router-on-a-stick uses subinterface connect multiple logical networks to a single router port.Traditional routing uses multiple paths to the router and therefore requires STP. Router-o does not provide multiple connections and therefore eliminates the need for STP.6 Which statement is true about ARP when inter-VLAN routing is being used on the network?When router-on-a-stick inter-VLAN routing is in use, each subinterface has a separate M address to send in response to ARP requests.When VLANs are in use, the switch responds to ARP requests with the MAC address of which the PC is connected.When router-on-a-stick inter-VLAN routing is in use, the router returns the MAC address physical interface in response to ARP requests.When traditional inter-VLAN routing is in use, devices on all VLANs use the same physic interface as their source of proxy ARP responses.7 What two statements are true regarding the use of subinterfaces for inter-VLAN routing? (Chsubinterfaces have no contention for bandwidthmore switch ports required than in traditional inter-VLAN routingfewer router ports required than in traditional inter-VLAN routingsimpler Layer 3 troubleshooting than with traditional inter-VLAN routingless complex physical connection than in traditional inter-VLAN routing8 Which three elements must be used when configuring a router interface for VLAN trunking?three.)one subinterface per VLANone physical interface for each subinterfaceone IP network or subnetwork for each subinterfaceone trunked link per VLANa management domain for each subinterfacea compatible trunking protocol encapsulation for each subinterface9Refer to the exhibit. Which two statements are true about the operation of the subinterfaces?two.)Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.2.Incoming traffic with VLAN ID 0 is processed by interface fa0/0.Subinterfaces use unique MAC addresses by adding the 802.1Q VLAN ID to the hardwa address.Traffic inbound on this router is processed by different subinterfaces, depending on the V which the traffic originated.Reliability of both subinterfaces is poor because ARP is timing out.Both subinterfaces remain up with line protocol up, even if fa0/0 line protocol is down. 10Refer to the exhibit. Port Fa0/0 on router R1 is connected to port Fa0/1 on switch S1. After th commands shown are entered on both devices, the network administrator determines that th on VLAN 2 are unable to ping the devices on VLAN 1. What is the likely problem?R1 is configured for router-on-a-stick, but S1 is not configured for trunking.R1 does not have the VLANs entered in the VLAN database.Spanning Tree Protocol is blocking port Fa0/0 on R1.The subinterfaces on R1 have not been brought up with the no shutdown command yet 11Refer to the exhibit. PC1 has attempted to ping PC2 but has been unsuccessful. What could for this failure?PC1 and R1 interface F0/0.1 are on different subnets.The encapsulation is missing on the R1 interface F0/0.An IP address has not been assigned to the R1 physical interface.The encapsulation command on the R1 F0/0.3 interface is incorrect.12Refer to the exhibit. R1 is routing between networks 192.168.10.0/28 and 192.168.30.0/28. P ping R1 interface F0/1, but cannot ping PC3. What is causing this failure?PC1 and PC3 are not in the same VLAN.The PC3 network address configuration is incorrect.The S1 interface F0/11 should be assigned to VLAN30.The F0/0 and F0/1 interfaces on R1 must be configured as trunks.13 Devices on the network are connected to a 24-port Layer 2 switch that is configured with VLASwitch ports 0/2 to 0/4 are assigned to VLAN 10. Ports 0/5 to 0/8 are assigned to VLAN 20, a 0/9 to 0/12 are assigned to VLAN 30. All other ports are assigned to the default VLAN. Whic allows all VLANs to communicate between each other while minimizing the number of ports to connect the VLANs?Configure ports 0/13 to 0/16 with the appropriate IP addresses to perform routing betwee Add a router to the topology and configure one FastEthernet interface on the router with subinterfaces for VLANs 1, 10, 20, and 30.Obtain a router with multiple LAN interfaces and configure each interface for a separate thereby allowing communication between VLANs.Obtain a Layer 3 switch and configure a trunk link between the switch and router, and co router physical interface with an IP address on the native VLAN.14 Which two statements are true about the interface fa0/0.10 command? (Choose two.)The command applies VLAN 10 to router interface fa0/0.The command is used in the configuration of router-on-a-stick inter-VLAN routing.The command configures a subinterface.The command configures interface fa0/0 as a trunk link.Because the IP address is applied to the physical interface, the command does not inclu address.15Refer to the exhibit. What two conclusions can be drawn from the output that is shown? (ChoThe no shutdown command has not been issued on the FastEthernet 0/0 interface.Both of the directly connected routes that are shown will share the same physical interfac router.A routing protocol must be configured on the network in order for the inter-VLAN routingsuccessful.Inter-VLAN routing between hosts on the 172.17.10.0/24 and 172.17.30.0/24 networks is successful on this network.Hosts in this network must be configured with the IP address that is assigned to the route interface as their default gateway.16 What are the steps which must be completed in order to enable inter-VLAN routing usingrouter-on-a-stick?Configure the physical interfaces on the router and enable a routing protocol.Create the VLANs on the router and define the port membership assignments on the swi Create the VLANs on the switch to include port membership assignment and enable a ro protocol on the router.Create the VLANs on the switch to include port membership assignment and configure subinterfaces on the router matching the VLANs.17Refer to the exhibit. The network administrator correctly configures RTA to perform inter-VLA The administrator connects RTA to port 0/4 on SW2, but inter-VLAN routing does not work. W be the possible cause of the problem with the SW2 configuration?Port 0/4 is not active.Port 0/4 is not a member of VLAN1.Port 0/4 is configured in access mode.Port 0/4 is using the wrong trunking protocol.18 What is important to consider while configuring the subinterfaces of a router when implemeninter-VLAN routing?The physical interface must have an IP address configured.The subinterface numbers must match the VLAN ID number.The no shutdown command must be given on each subinterface.The IP address of each subinterface must be the default gateway address for each VLAN19 In which situation could individual router physical interfaces be used for InterVLAN routing, inrouter-on-a-stick configuration?a network with more than 100 subnetworksa network with a limited number of VLANsa network with experienced support personnela network using a router with one LAN interface20Refer to the exhibit. Switch1 is correctly configured for the VLANs that are displayed in the gr configuration that is shown was applied to RTA to allow for interVLAN connectivity between attached to Switch1. After testing the network, the administrator logged the following report: Hosts within each VLAN can communicate with each other.Hosts in VLAN5 and VLAN33 are able to communicate with each other.Hosts connected to Fa0/1 through Fa0/5 do not have connectivity to host in other VLANs.Why are hosts connected to Fa0/1 through Fa0/5 unable to communicate with hosts in differ VLANs?The router interface is shut down.The VLAN IDs do not match the subinterface numbers.All of the subinterface addresses on the router are in the same subnet.The router was not configured to forward traffic for VLAN2.The physical interface, FastEthernet0/0, was not configured with an IP address.。

1. What are three primary benefits of using VLANs? (Choosethree.)•security• a reduction in the number of trunk links•cost reduction•end user satisfaction•improved IT staff efficiency•no required configuration2. Which type of VLAN is used to designate which traffic isuntagged when crossing a trunk port?•data•default•native•management3. A network administrator is determining the best placement ofVLAN trunk links. Which two types of point-to-pointconnections utilize VLAN trunking? (Choose two.)•between two switches that utilize multiple VLANs•between a switch and a client PC•between a switch and a server that has an 802.1Q NIC•between a switch and a network printer•between two switches that share a common VLAN4. What must the network administrator do to remove FastEthernet port fa0/1 from VLAN 2 and assign it to VLAN 3?•Enter the no vlan 2 and the vlan 3 commands in global configuration mode.•Enter the switchport access vlan 3 command in interface configuration mode.•Enter the switchport trunk native vlan 3 command in interface configuration mode.•Enter the no shutdown command in interface configuration mode to return it to the default configuration and then configure the port for VLAN 3.5. When a Cisco switch receives untagged frames on a 802.1Qtrunk port, which VLAN ID is the traffic switched to by default?•unused VLAN ID•native VLAN ID•data VLAN ID•management VLAN ID6. Port Fa0/11 on a switch is assigned to VLAN 30. If thecommand no switchport access vlan 30 is entered on theFa0/11 interface, what will happen?•Port Fa0/11 will be shutdown.•An error message would be displayed.•Port Fa0/11 will be returned to VLAN 1.•VLAN 30 will be deleted.7.Which command is used to remove only VLAN 20 from a switch?•delete vlan.dat•delete flash:vlan.dat•no vlan 20•no switchport access vlan 208. What happens to a port that is associated with VLAN 10when the administrator deletes VLAN 10 from the switch?•The port becomes inactive.•The port goes back to the default VLAN.•The port automatically associates itself with the native VLAN.•The port creates the VLAN again.9. Which two characteristics match extended range VLANs?(Choose two.)•CDP can be used to learn and store these VLANs.•VLAN IDs exist between 1006 to 4094.•They are saved in the running-config file by default.•VLANs are initialized from flash memory.•They are commonly used in small networks.10. A Cisco switch currently allows traffic tagged withVLANs 10 and 20 across trunk port Fa0/5. What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?•It allows VLANs 1 to 30 on Fa0/5.•It allows VLANs 10, 20, and 30 on Fa0/5.•It allows only VLAN 30 on Fa0/5.•It allows a native VLAN of 30 to be implemented on Fa0/5.11. Refer to the exhibit. PC-A and PC-B are both in VLAN60. PC-A is unable to communicate with PC-B. What is theproblem?•The native VLAN should be VLAN 60.•The native VLAN is being pruned from the link.•The trunk has been configured with the switchport nonegotiate command.•The VLAN that is used by PC-A is not in the list of allowed VLANs on the trunk.12. Refer to the exhibit. DLS1 is connected to anotherswitch, DLS2, via a trunk link. A host that is connected toDLS1 is not able to communicate to a host that is connected to DLS2, even though they are both in VLAN 99. Whichcommand should be added to Fa0/1 on DLS1 to correct the problem?•switchport nonegotiate•switchport mode dynamic auto•switchport trunk native vlan 66•switchport trunk allowed vlan add 9913. What is a characteristic of legacy inter-VLAN routing?•Only one VLAN can be used in the topology.•The router requires one Ethernet link for each VLAN.•The user VLAN must be the same ID number as the management VLAN.•Inter-VLAN routing must be performed on a switch instead of a router.14. What is a disadvantage of using router-on-a-stick inter-VLAN routing?•does not support VLAN-tagged packets•requires the use of more physical interfaces than legacy inter-VLAN routing•does not scale well beyond 50 VLANs•requires the use of multiple router interfaces configured to operate as access links 15. Refer to the exhibit. Router RA receives a packet with asource address of 192.168.1.35 and a destination address of 192.168.1.85. What will the router do with this packet?•The router will drop the packet.•The router will forward the packet out interface FastEthernet 0/1.1.•The router will forward the packet out interface FastEthernet 0/1.2.•The router will forward the packet out interface FastEthernet 0/1.3.•The router will forward the packet out interface FastEthernet 0/1.2 and interface FastEthernet 0/1.3.16. Refer to the exhibit. In what switch mode should portG0/1 be assigned if Cisco best practices are being used?•access•trunk•native•auto17. A small college uses VLAN 10 for the classroomnetwork and VLAN 20 for the office network. What is needed to enable communication between these two VLANs while using legacy inter-VLAN routing?• A router with at least two LAN interfaces should be used.•Two groups of switches are needed, each with ports that are configured for one VLAN.• A router with one VLAN interface is needed to connect to the SVI on a switch.• A switch with a port that is configured as trunk is needed to connect to a router.18. Refer to the exhibit. A network administrator needs toconfigure router-on-a-stick for the networks that are shown.How many subinterfaces will have to be created on the router if each VLAN that is shown is to be routed and each VLAN has its own subinterface?• 1• 2• 3•4• 519. When configuring a router as part of a router-on-a-stickinter-VLAN routing topology, where should the IP address be assigned?•to the interface•to the subinterface•to the SVI•to the VLAN20. A high school uses VLAN15 for the laboratory networkand VLAN30 for the faculty network. What is required toenable communication between these two VLANs whileusing the router-on-a-stick approach?• A multilayer switch is needed.• A router with at least two LAN interfaces is needed.•Two groups of switches are needed, each with ports that are configured for one VLAN.• A switch with a port that is configured as a trunk is needed when connecting to the router.21. Refer to the exhibit. A router-on-a-stick configurationwas implemented for VLANs 15, 30, and 45, according to the show running-config command output. PCs on VLAN 45 that are using the 172.16.45.0 /24 network are having troubleconnecting to PCs on VLAN 30 in the 172.16.30.0 /24 network.Which error is most likely causing this problem?•The wrong VLAN has been configured on GigabitEthernet 0/0.45.•The command no shutdown is missing on GigabitEthernet 0/0.30.•The GigabitEthernet 0/0 interface is missing an IP address.•There is an incorrect IP address configured on GigabitEthernet 0/0.30.22. Fill in the blank. Use the full command syntax.The show vlan command displays the VLANassignment for all ports as well as the existing VLANs on the switch.23. Open the PT Activity. Perform the tasks in the activityinstructions and then answer the question.Which PCs will receive the broadcast sent by PC-C?•PC-A, PC-B•PC-D, PC-E•PC-A, PC-B, PC-E•PC-A, PC-B, PC-D, PC-E•PC-A, PC-B, PC-D, PC-E, PC-F。

请参见图示。

下列哪三种说法正确所示的网络设计？（选择三项。

）此设计不易扩展。

路由器将VLAN 合并到单个广播域内。

此设计使用了一些不必使用的交换机端口或路由器端口。

此设计超出了交换机可连接的VLAN 的最大数量。

此设计需要在交换机与路由器之间的链路上使用ISL 或802.1q 协议。

如果交换机与路由器之间的物理接口可以正常工作，则不同VLAN 中的设备可通某路由器有两个快速以太网接口，需要连接到本地网络中的四个VLAN。

在不降低网络必要性能的何才能使用数量最少的物理接口达到此要求？实施单臂路由器配置。

实用文档另加一台路由器来处理VLAN 间的通信。

使用集线器将四个VLAN 与路由器上的一个快速以太网接口相连。

VLAN 之间通过另外两个快速以太网接口互连。

实用文档3请参见图示。

所有设备的配置如图可成功ping 通R1 的F0/0 接口。

PC2 无法ping 通PC1。

此故障的原因可能是R1 的F0/1 接口上未配置子接口。

需要将S1 的F0/6 接口配置为在VLAN10 中工作。

S1 的F0/8 接口处于错误的VLAN 中。

S1 的F0/6 端口不在VLAN10 中。

实用文档请参见图示。

图用于将路由器连接到中继的上行链路。

收到的数据包发自IP 地址192.168.1.54。

destination address is 192.168.1.120.路由器会如何处理此数据包？路由器会将该数据包从接口FastEthernet 0/1.1（VLAN 10的接口）转发出路由器会将该数据包从接口FastEthernet 0/1.2（VLAN 60 的接口）转发出实用文档路由器会将该数据包从接口FastEthernet 0/1.3（VLAN 120的接口）转发出去路由器不会处理该数据包，原因在于源地址和目的地址在同一个子网内。

路由器会丢弃该数据包，原因在于路由器所连接的网络中不存在该源地址。

传统路由与单臂路由器有何区别？传统路由只能使用单个交换机接口。

1请参见图示。

网络支持技术人员需要为新路由器的一个FastEthernet 接口设置IP 地址。

但接口拒绝该地址，其原因是什么该IP 地址已在使用中。

技术人员使用的是网络地址。

技术人员为/26 使用了错误的子网掩码。

技术人员必须在该接口上启用VLSM。

2一个销售代表准备从酒店使用Internet 向公司总部发送敏感信息。

旅行前，IT 工作人员进行了必要工作以允许其安全访问该销售代表实施了什么解决方VPN帧中继带有CHAP 身份验证的PPP带有PAP 身份验证的PPP3下列哪两种说法正确描述了IEEE STP 的功能？（选择两项。

）它会立即将不处于丢弃状态的所有端口转换为转发状态。

它提供了一种在交换网络中禁用冗余链路的机制。

它有三种端口状态：丢弃、学习和转发。

它可确保交换网络中没有环路。

它可在不到 1 秒的时间内使交换网络收敛。

4请参见图示。

网络管理员必须为ISP 手动总结POP 路由器上的所有IP 地址。

下列哪项是正确的总结地址？192.168.0.0/2192.168.0.0/23192.168.0.0/24192.168.0.0/255请参见图示。

所有路由器都配置为使用带有默认设置的OSPF 协议。

如果同时启动所有路由器，哪台路由器将被选为BDRR1R2R3R46有关单区域OSPF 网络的说法中，哪两项正确？（选择两项。

）DR 和BDR 会减少在广播网络中发送的更新数量。

BDR 负责将更改发布到所有其它的OSPF 路由器。

路由器使用hello 数据包建立和维护邻居邻接关系。

所有OSPF 路由器都会接收组播地址224.0.0.6 上的更新。

区域 1 必须始终存在。

7请参见图示。

网络管理员按图示配置R1。

但是，网络 A 的一些主机无法访问Internet。

下列哪两个措施可解决此问题？（在正确的接口上配置ip nat inside和ip nat outside命令。

在NAT 地址池中增加IP 地址数量。

思科CCNA新版第3学期final-期末考试答案1出于维护目的，已将路由器从网络中移除。

并已将新的 Cisco IOS 软件映 像成功下载到服务器并复制到路由器的闪存中。

应该在进行什么操作后再 将路由器放回网络中运行？备份新的映像。

将运行配置复制到 NVRAM 。

从闪存中删除之前版本的 Cisco IOS 软件。

重新启动路由器并检验新的映像是否成功启动。

答案 说明最高分值correctness of response Option 422请参见图示。

管理员尝试在路由器上配置 IPv6 的 EIGRP ，但收到如图所示 的错误消息。

配置 IPv6 的 EIGRP 之前，管理员必须发出什么命令？no shutdowneigrp router-id 100.100.100.100ipv6 unicast-routingipv6 eigrp 100ipv6 cef答案 说明 最高分值correctness of response Option 323IPv6 EIGRP 路由器使用哪个地址作为 hello 消息的来源？32 位路由器ID接口上配置的 IPv6 全局单播地址所有 EIGRP 路由器组播地址接口 IPv6 本地链路地址答案 说明 最高分值correctness of response Option 424下列关于 EIGRP 确认数据包的说法，哪两项是正确的？（请选择两项。

）发送该数据包是为了响应 hello 数据包。

该数据包用于发现接口上连接的邻居。

该数据包作为单播发送。

该数据包需要确认。

该数据包不可靠。

答案 说明 最高分值correctness of response Option 3 and Option 5 are correct.25何时发送 EIGRP 更新数据包？仅在必要时当获取的路由过期时每 5 秒通过组播发送每 30 秒通过广播发送答案 说明 最高分值correctness of response Option 126请参见图示。

第一章Question 1分数: 1在处于不同的 VLAN 中的设备间配置通信需要使用OSI 模型中的哪个层？ 选择一个答案A. 第 3 层B. 第 1 层C. 第 4 层D. 第 5 层错误这次提交的分数：0/1。

Question 2 分数: 1推荐同时在核心层和分布层采用哪种分层设计特征以在发生路由故障时保护网络？选择一个答案A. 冗余B. PoEC. 访问列表D. 聚合正确这次提交的分数：1/1。

Question 3 分数: 1分层网络设计模型中的哪一层称为互连网络的高速主干层，其中高可用性和冗余性是该层的关键？ 选择一个答案A. 数据链路层B. 核心层C. 接入层D. 网络层E. 物理层F. 分布层正确这次提交的分数：1/1。

Question 4 分数: 1技术人员尝试向准备安装三台可堆叠交换机的客户解释 Cisco StackWise 技术。

下列哪种解释能准确说明 StackWise 技术？ 选择一个答案A. StackWise 技术可通过增加线路卡来扩展交换机功能和端口。

B. StackWise 技术最多可将八个端口绑定在一起以提高可用带宽。

C. 通过 StackWise 技术，交换机可使用现有以太网电缆为终端设备供电。

D. 通过使用完全冗余的背板，StackWise 技术最多可使九台交换机实现互连。

错误这次提交的分数：0/1。

Question 5 分数: 1企业级交换机有哪两项特点？ （选择两项。

） 选择至少一个答案A. 支持链路聚合B. 端口密度低C. 延时水平高D. 端口数量预先确定E. 转发速度高正确这次提交的分数：1/1。

Question 6 分数: 1网络技术人员应要求检查现有的交换网络。

检查结束后，技术人员提议添加新的交换机并更换影响性能的现有设备。

技术人员的建议获得了批准并得到预算上的支持。

以下哪两项信息有助于确定新交换机所需的端口密度？（选择两项。

） 选择至少一个答案A. 转发速率B. 流量分析C. 未来的预计发展D. 接入层为提高性能所需的集线器数量E. 所需核心层连接的数量错误这次提交的分数：0/1。