CISCO考试题库试题翻译1-86题

思科认证CCNA认证试题和答案中文版思科认证CCNA认证试题和答案中文版想要获得思科认证，首先要参加由思科推荐并授权的培训中心(Cisco Training Partner，简称CTP)所开设的培训课程。

完成学业后再到由全球考试机构Sylvan Prometric授权的.考试中心参加由思科指定的科目的认证考试。

通过指定的系列科目考试后，学员就可以获得相应分支系列等级的资格认证。

下面是店铺为大家搜集的相关试题，供大家参考练习。

16、路由器A串口0配置如下interface serial0link-protocol pppppp pap local-user huawei password simple quidwayip address 2.2.2.1 255.0.0.0路由器B串口及全局配置如下local-user huawei service-type ppp password simple quidway!interface serial0link-protocol pppppp authentication-mode papip address 2.2.2.2 255.0.0.0当两台路由器串口0相连时，两台路由器是否可以连接到对端()(A) 能(B) 不能答案：A17、关于千兆以太网，以下说法正确的是( )(A) IEEE802.3ab定义了千兆以太网(B) 在同一冲突域中，千兆以太网不允许中继器的互连(C) IEEE802.3z专门定义了千兆以太网在双绞线上的传输标准(D) 千兆以太网支持网络速率的自适应，可以与快速以太网自动协商传输速率答案：AB参考知识点：华为3com认证教材第一册3-8页18、高层的协议将数据传递到网络层后，形成( )，而后传送到数据链路层(A) 数据帧(B) 信元(C) 数据包(D) 数据段答案：C参考知识点：华为3com认证教材第一册1-20页19、在路由器上配置帧中继静态map必须指定( )参数(A) 本地的DLCI(B) 对端的DLCI(C) 本地的协议地址(D) 对端的协议地址答案：AD20、路由器的主要性能指标不包括( )(A) 延迟(B) 流通量(C) 帧丢失率(D) 语音数据压缩比答案：D【思科认证CCNA认证试题和答案中文版】。

思科CISCO笔试题目+解析和答案思科（CISCO）笔试题目+解析和答案一题：解：求至少几人及格，也就是求最多多少人不及格，情况分为：做对0个，做对1个，做对2个，做对3个，做对4个，做对5个，为了使不及格人最多，不妨对做对0个的人说，为何不把你的做错的两道给做对3个或4个的人呢，这样你还是不及格并且可以多增加人不及格，这样做对0个把自己的错误2个题给别人，他错3个，同理做对1个的把自己的.一个错误题给别人，这样保证了不及格人最多，经过以上分析，现在不及格人最多时，只有一下几种情况：做对2个，做对3个，做对4个，做对5个。

分别设人数为：X2,X3.X4.X5，则：当X2最大是，至少及格人数为：100-X2X2+X3+X4+X5=100 (1)总错误题数为：100*5-（80+72+84+88+56）＝120则：3X2+2X3+X4=120 (2)(2)-(1)得：2X2+X3-X5=20 (3)可以看出要想使X2最大，则X3最小，X5最大，则：X3=0,X5=56,则X2=38,X4=6,即做对2个38，做对3个0，做对4个6，全对56。

也就是说至少有100-X2=100-38=62人及格，对结果进行分析：对于第五题只有56人做对，那么38+6=44，即做对4个和做对2个的都有第五题做错，那么做对2个的38人只能在前4道题中错2道：显然很好分配，分法之一：38-28＝10，做错1和2的10人，做错1和3的20-10＝10人，做错2和3的16-10＝6人，做错2和4的12人。

二题：10人和一个司机时间最少，则车接第十人正好与前面9个人一起到达终点设第一个人坐车T1小时，步行T2小时，求T1+T2,则：100T1+5T2=1000 (1)假设在D点把第一人放下，在C点车回来接到第二人，则车从D-C 时间为：t＝(100T1-5T1)/105,设从车载第二人开始开始到车追上第一人时，第一个走了s公里到达E点则：车在C点时，车与第一人的距离为105t＝100T1-5T1=95T1，则：(95T1+s)/100=s/5 (2)即：5T1=s第一人从D-E走了：5t+s公里同理可知第三人到第10 人与第二人一样，则车一共送10人次，回头接人（空车）9次则第一人共走了9*（5t+s）=5T2即：9*[5*(100T1-5T1)/105+S]=5T2 (3)由（1），（2）（3）可得：T1=70/13,T2=1200/13,则：T1+T2=1270/13＝97.69小时。

1. what could be possible causes for the "Serial0/0 is down"interface status? 这可能是为“Serial0 / 0的可能原因是向下”接口的状态？TWOA.a layer 1 problem exists.1层存在问题D.an incorrect cable is being used。

2.before installing a new,upgraded version of the ios,what should be checked on the router,and which command should be used to gather this information?在安装一个新的，升级的IOS版本，应该怎样检查路由器上，并命令应该被用来收集这些资料？B.the amount of avaiable flash and ram 缴费的闪存和RAM的数量D.show version 显示版本3.refer to the exhibit. which two statements are true about inter VLAN routing in the topology that is shown in the exhibit?（choose two）指展览。

这两个语句是对国际米兰的是在展会上展出的拓扑路由的VLAN是否属实？D. the FastEthernet 0/0 inerface on router1 must be configured with subinterfaces.关于路由器1的在FastEthernet 0/0 inerface 必须配置子接口F.the FastEthernet 0/0 interface on router1 and switch2 trunk ports must be configured using the same encapsulation type. 对在FastEthernet 0/0 接口上路由器1和交换器2中继端口必须配置使用相同的封装类型。

思科认证CCNA认证试题与答案中文版思科认证CCNA认证试题与答案中文版思科认证的考试内容包括笔试和实验。

笔试在全球认证的考试中心进行，时间为两个小时。

实验考试只限于思科在全世界范围内指定的6个考点，分别位于美国、澳大利亚、比利时、日本、北京的新世纪饭店以及香港。

实验室考试分为2天，第一天要求学生利用实验室提供的设备建立网络。

第二天由考官故意破坏学员的网络，学员则要想办法查出故障并加以解决。

下面是店铺为大家搜集的相关试题，供大家参考练习。

21、一个B类网络，有5位掩码加入缺省掩码用来划分子网，每个子网最多( )台主机(A) 510(B) 512(C) 1022(D) 2046答案：D22、在路由器中，能用以下命令察看路由器的路由表( )(A) arp -a(B) traceroute(C) route print(D) display ip routing-table答案：D23、DHCP客户端是使用地址( )来申请一个新的IP地址的(A) 0.0.0.0(B) 10.0.0.1(C) 127.0.0.1(D) 255.255.255.255答案：D注释:255.255.255.255是全网广播,DHCP客户端发送全网广播来查找DHCP服务器.24、下面有关NAT叙述正确的是( )(A) NAT是英文“地址转换”的缩写，又称地址翻译(B) NAT用来实现私有地址与公用网络地址之间的转换(C) 当内部网络的主机访问外部网络的时候，一定不需要NAT(D) 地址转换的.提出为解决IP地址紧张的问题提供了一个有效途径答案：ABD25、以下属于正确的主机的IP地址的是( )(A) 224.0.0.5(B) 127.32.5.62(C) 202.112.5.0(D) 162.111.111.111答案：D注释:这个题目不是太严谨,应该加上子网掩码.A:224.0.0.5是多播地址B:127.0.0.0保留作为测试使用C:网络地址26、设置主接口由up转down后延迟30秒切换到备份接口，主接口由down转up后60秒钟切换回主接口的配置为( )(A) standby timer 30 60(B) standby timer 60 30(C) standby timer enable-delay 60 disable-delay 30(D) standby timer enable-delay 30 disable-delay 60答案：D27、在一个以太网中，30台pc通过Quidway R2501路由器s0口连接internet，Quidway R2501路由器配置如下：[Quidway-Ethernet0]ip address 192.168.1.1 255.255.255.0 [Quidway-Ethernet0]quit[Quidway]interface s0[Quidway-Serial0]ip address 211.136.3.6 255.255.255.252[Quidway-Serial0]link-protocol ppp一台PC机默认网关为192.168.2.1,路由器会怎样处理发自这台PC 的数据包?(A) 路由器会认为发自这一台PC的数据包不在同一网段，不转发数据包(B) 路由器会自动修正这一台PC机的IP地址，转发数据包(C) 路由器丢弃数据包，这时候需要重启路由器，路由器自动修正误配(D) 路由器丢弃数据包，不做任何处理，需要重配PC网关为192.168.1.1答案：D注释:PC的默认网关要指向路由器的以太网口的IP地址.28、ISDN B信道速率是()(A) 16kbps(B) 64kbps(C) 144kbps(D) 2048kbps答案:B参考知识点：综合数字业务网(ISDN)由数字电话和数据传输服务两部分组成，一般由电话局提供这种服务。

Cisco认证模拟题篇一：思科认证CCNP经典试题第一部分填空题1、在Cisco体系的IGP协议中，RIP的A-D管理距离是，EIGRP的域内A-D管理距离是，EIGRP的域外A-D管理距离是OSPF的A-D管理距离是。

BGP从EBGP学习到的路由学到路由的A-D管理距离是; BGP 从IBGP学习到的路由学到路由的A-D管理距离是。

2、BGP的默认MED值为；其中MED越越优选被用于选路；BGP 从邻居哪里学到的权重为；BGP自己本路由产生的路由（始发路由）产生权重是；BGP的默认本地优先级为：。

3、BGP的邻居分为和。

4、OSPF在那个区域（有区域0，区域1，区域2）广播多路访问（比如以太网，没有出现外部网络），在区域0可以看到类LSA。

如果想看到2类LSA，必须在网络类型；在NSSA区域可以看到类LSA，在纯粹的NASS区域内是否有5类LSA？（回答是或者否）。

5、HSRP包括哪六种状态？6、OSPF在MA网络链路类型的HELLO报文作用？（3种）7、IPV6的本地链路地址是。

（没有/10的写法）8、在选择STP的角色（身份）有哪些？默认STP的收敛时间为配置了portfast后，收敛时间会小于。

9、OSPF发送hello包的组播地址是，EIGRP组播地址是；HSRP发送hello包组播地址是；VRRP发送hello包的组播地址是。

10、目前以太通道最多可以使用通道方式有。

11、BGP在EBGP中使用AS间的环路（确保无环），该属性属于BGP的必遵属性，其中还有哪两个是BGP公认必遵属性为和。

第二部分选择1、在对基于CEF的多层交换（MLS）进行排错的时候，例如解决无法到达特定的IP目标等问题，首先需要先查看哪两张表去验证错误？（）A、IP路由表和路由表B、IP路由和CEF邻接关系表C、TCAM中的IPCEFFIB和邻接关系表D、IP路由表和ARP表2、EIGRP位一个混合距离矢量协议，在METRIC值中使用K1-K5五个K值，默认情况下，使用K值分别是（）A、K1，K2BK3,K4C、K1，K5D、K1，K33、OSPF中router-id能标识一台设备的身份，下面说法正确的是（）A、先选举手工配置，然后选择设备loopback地址大的，在选运行了宣告进OSPF最大的物理接口最大的地址。

CCNA考试题库中英文翻译版及答案1[1]1. What are two reasons that a network administrator would use access lists? (Choose two.)1.出于哪两种理由，网络管理员会使用访问列表?A. to control vty access into a routerA.控制通过VTY访问路由器B. to control broadcast traffic through a routerB.控制广播流量穿越路由器2.一个默认的帧中继WAN被分类为哪种物理网络类型?A. point-to-pointA.点到点B. broadcast multi-accessB.广播多路访问C. nonbroadcast multi-accessC.非广播多路访问D. nonbroadcast multipointD.非广播多点E. broadcast point-to-multipointE.广播点到多点Answer: C3. A single 802.11g access point has been configured and installed in the center of a squarA few wireless users are experiencing slow performance and drops while most users are oat peak efficiency. What are three likely causes of this problem? (Choose three.)3.一个802.11接入点被部署在一个方形办公室的中央，当大多数用户在大流量传输数一些无线用户发现无线网络变得缓慢和出现丢包A. mismatched TKIP encryptionB. null SSIDC. cordless phonesD. mismatched SSIDE. metal file cabinetsF. antenna type or directionAnswer: CEF4. Refer to the exhibit. How many broadcast domains exist in the exhibited topology?根据下图，图中的拓扑中存在多少个广播域?A. one A.1B. two B.2C. three C.3D. four D.4E. five E.5F. six F.6Answer: C5. Refer to the exhibit. What two facts can be determined from the WLAN diagram? (Choose two.)5.根据下图，WLAN diagram决定了哪两个事实A. The area of overlap of the two cells represents a basic service set (BSS).A. 两个 cells的overlap的区域描述了一个basic service setB. The network diagram represents an extended service set (ESS).B. 网络描述了一个extended service setC. Access points in each cell must be configured to use channel 1.C. 再每个CELL中的AP必须被配置成使用channel 1D. The area of overlap must be less than 10% of the area to ensure connectivity.D. 为了确保连通性,重叠区域必须小于10%E. The two APs should be configured to operate on different channels.E. 两个访问点应该被配置成工作在不同的频道Answer: BE6. The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router.Which of the following statements is true concerning this command?6.路由器上输入命令frame-relay map ip 10.121.16.8 102 broadcast，以下选项正确的是?A. This command should be executed from the global configuration mode.A.该命令应该在全局配置模式下被执行B. The IP address 10.121.16.8 is the local router port used to forward data.B.IP地址10.121.16.8是本地路由器用来转发数据的接口C. 102 is the remote DLCI that will receive the information.C.102是远端的DLCI它将接受信息。

实验报告用纸课程计算机网络基础日期2014 年5 月4日班级学号姓名成绩实验题目:实验4：第六七八章测试一、实验目的1.掌握Frame定义2.掌握以太网的相关知识二、实验内容1.What does a switch build as it reads MAC addresses that pass through it?交换机构建下列哪张表，通过它可以读取MAC地址？选择一项：a. Routing Topology table路由拓扑表b. Store and Forward list存储和转发列表c. MAC Route Address table MAC地址表d. Content Addressable Memory table内容可寻址存储表e. Cut-through domain直通域正确答案是：Content Addressable Memory table2.Which switching mode results in the lowest amount of latency and provides no error checking?下面哪种交换转发模式具有最低的延迟，但不提供错误的检查？选择一项：a. synchronous同步b. fragment-free无碎片转发c. cut-through 贯通转发d. store-and-forward存储转发正确答案是：cut-through3.What will a bridge do if it receives a frame with a MAC address that is not within the table?如果网桥收到一个MAC地址并不在表内的数据帧，将会如何处理？选择一项：a. ignore frame忽略数据帧b. send frame to appropriate port 发送到适当的端口c. discard frame丢弃帧d. send frame to all ports except source port 泛洪到除源端口外的其他端口正确答案是：send frame to all ports except source port4.Which of the following is a term associated with replacing hubs with switches to increase the number of collision domains?下列哪项是长期与交换机，以增加冲突域的数量代替集线器相联？选择一项：a. extended扩展b. encapsulation封装c. layered model分层模型d. latencye. broadcast domain广播域f. segmentation 分割正确答案是：segmentation5.Which of the following are not to be exceeded when implementing the 5-4-3-2-1 Rule? (Choose three.)下列哪项是实施5-4-3-2-1规则时不超过？（选择三项。

实验报告用纸课程计算机网络基础日期2013 年3 月8日班级学号姓名成绩实验题目:实验1：第一章测试一、实验目的1.掌握网络数学相关内容2.了解连接网络的条件3.掌握浏览器的相关功能二、实验内容1.Why were TCP/IP protocols developed?为什么要开发TCP / IP协议?选择一项：a. To allocate resources that are needed for operating a computer on a LAN.分配所需资源操作计算机局域网b. To insure that error correction of each packet takes place.以确保每个数据包的误差修正c. To allow cooperating computers to share resources across a network让电脑通过网络共享资源d. To determine the "best path" decision making when forwarding packets of data. 决策确定转发数据包时的“最佳路径”。

正确答案是：To allow cooperating computers to share resources across a network2.Which of the following will test the internal loopback of a node?下列哪个是测试一个节点的内部环回地址?选择一项：a. ping 255.255.255.255b. ping 192.168.1.1c. ping 223.223.223.223d. ping 127.0.0.1e. ping 10.10.10.1正确答案是：ping 127.0.0.13.Convert the Base 10 number 116 into its eight bit binary equivalent. Choose the correct answer from the following list:基地10 116转换成它的等效八位二进制。

ccie笔试试题及答案CCIE笔试试题及答案一、选择题1. 在Cisco网络设备上，以下哪个命令可以用来查看当前设备的ARP 表？A. show arpB. show mac address-tableC. show cdp tableD. show ip route答案：A2. 以下哪个协议用于在OSPF中建立邻居关系？A. TCPB. UDPC. ICMPD. IGMP答案：B3. 在BGP中，以下哪个属性是可选的，并且可以用来控制路由选择？A. Local PreferenceB. AS Path LengthC. Network Layer Reachability Information (NLRI)D. Next Hop答案：A4. 在Cisco设备上配置静态路由时，以下哪个命令是正确的？A. ip route [network] [mask] [next-hop]B. route [network] [mask] [next-hop]C. static route [network] [mask] [next-hop]D. configure terminalip route [network] [mask] [next-hop]答案：A5. 在IPv6中，一个地址块被划分为多个子网，以下哪个命令可以用来显示这些子网？A. show ipv6 routeB. show running-configC. show ipv6 interfaceD. show ipv6 neighbors答案：A二、填空题1. 在Cisco设备上，使用________命令可以查看设备的IOS版本信息。

答案：show version2. 在OSPF协议中，路由器之间的信任关系是通过________认证来增强的。

答案：authentication3. EIGRP是一种________路由协议，它使用________算法来计算最短路径。

思科CCIE认证考试模拟试题及答案「最新」思科CCIE认证考试模拟试题及答案「最新」思科CCIE认证主要考试内容是什么?今天yjbys店铺为大家分享的是CCIE认证考试模拟试题及答案，仅供同学们复习!1. Two BGP peers connected through a routed firewall are unable to establish a peering relationship. What could be the most likely cause?两个直连BGP邻居，无法通过防火墙建立邻居关系，最有可能是什么原因?A. BGP peers must be Layer 2-adjacent.B. EBGP multihop is not configured. EBGP邻居的多跳没有设置C. The firewall is not configured to allow IP protocol 89.D. The firewall is not configured to allow UDP 179.Answer: B2. Which two of these steps are minimum requirements to configure OSPFv3 under IPv6? (Choose two.) 需要哪两个步骤开始用最基本在IPv6上使用OSPFv3协议 A. Configure a routing process using the command ipv6 router ospf [process-id]. B. Add the network statement for the interfaces on which OSPF will run. C. Configure OSPF on the interface that it will run on. D. Use the passive-interface command on the interfaces on which OSPF should not run. E. Enable routing.Answer: CE3. You add the following commands into a routed topology: router eigrp 1 variance 3 traffic-share min across-interfaces. Users now complain about voice quality in your VoIP system. What should be done?你在路由器上加入了下面的命令“router eigrp 1 variance 3 traffic-share min across-interfaces”用户现在抱怨在Voip服务中语音通信质量很差，你该怎么做?A. Add the command: router eigrp 1 traffic-share voice interface fast 0/0.B. Reconfigure EIGRP to recognize voice packets.C. Remove the variance from the configuration. 删除这条配置命令D. Reconfigure the VoIP system to use RTP sequence number headers.E. Use an H.323 gatekeeper for your VoIP system to negotiate an H.245 uneven packet buffer.F. Reconfigure EIGRP to version 2.Answer: C4. Refer to the exhibit. How would you get the 1.1.1.1 network into the OSPF database?如图所示，怎么做可以让1.1.1.1网络进入OSPF数据库中?A. Configure RTA as an ASBR.B. Redistribute connected routes on RTA into OSPF.C. Set up a virtual link between area 1 and area 0.建立一条虚链路在区域1和区域0之间D. Set up a virtual link between area 1 and area 2.E. Add a static route into RTB and enter it into OSPF. F. Place a network 1.1.1.0 0.0.0.0 command into RTB.G. Set up a unique router ID on RTA using an RFC 1918 address.H. Change area 0 on RTB to area 1Answer: C5. Refer to the exhibit. Router E learned about the PIM RP (designated as 7.7.7.7) from four different sources. Routers A and D advertised the 7.0.0.0 network via EIGRP. Routers B and C advertised the 7.0.0.0 network via OSPF. Considering that all four Ethernet interfaces on router E could potentially lead back to the PIM-RP, when router E receives the first multicast packet down the shared tree, which incoming interface will be used to successfully pass the RPF check?如图所示，路由器E从不同渠道学习7.7.7.7的的路由。

Cisco 练习题一、网络基础概念1.1 网络协议与标准1. 请列举TCP/IP模型的四层及其作用。

2. 描述OSI模型的七层及其作用。

3. 简述TCP和UDP协议的区别。

1.2 IP地址与子网划分4. 请解释IP地址的分类及其特点。

5. 如何进行子网划分？请举例说明。

6. 请解释私有IP地址和公网IP地址的区别。

1.3 网络设备7. 请列举常见的网络设备及其作用。

8. 描述路由器和交换机的工作原理。

9. 简述VLAN技术的应用场景。

二、Cisco设备配置2.1 路由器配置10. 如何配置路由器的接口和IP地址？11. 如何配置路由器的静态路由和动态路由？12. 请描述路由器NAT配置的步骤。

2.2 交换机配置13. 如何配置交换机的VLAN？14. 如何配置交换机的Trunk和Access模式？15. 请描述交换机STP的工作原理。

2.3 网络监控与故障排除16. 如何使用show命令查看网络设备的状态？17. 请列举常见的网络故障及其解决方法。

18. 如何使用Wireshark进行网络抓包分析？三、网络安全3.1 访问控制19. 请解释访问控制列表（ACL）的作用。

20. 如何配置标准ACL和扩展ACL？21. 请描述防火墙的工作原理。

3.2 加密与认证22. 请解释SSL/TLS协议的作用。

23. 如何配置SSH远程登录？24. 请描述RADIUS和TACACS+认证的区别。

四、网络应用4.1 虚拟化技术25. 请解释虚拟化技术的概念及其应用场景。

26. 如何配置Cisco的虚拟路由器？27. 请描述VMware的NSX技术。

4.2 云计算与大数据28. 请解释云计算的概念及其服务模式。

29. 如何配置OpenStack环境？30. 请描述大数据技术在网络中的应用。

五、网络编程与自动化5.1 Python编程31. 请列举Python中常用的网络编程库。

32. 如何使用Python编写简单的网络爬虫？33. 请描述Ansible自动化工具的原理。

思科Cisco认证最新真题50道：TCP/IP1: Your junior network administrator wants to know what the default subnet mask is for a Class C IP address. What do you tell him?A. 255.0.0.0B. 255.255.0.0C. 255.245.255.0D. 255.255.255.0E. 255.255.255.2552: An application needs to have reliable, end-to-end connect-ivity. Which of the following protocols will give you reliable connectivity?A. TCPB. UDPC. IPD. ICMP3: You are designing a network, which needs to support 55 users. You don't plan to extend the segment beyond the current number of users. Which subnet mask would best meet your needs?A. 255.255.0.0B. 255.255.255.0C. 255.255.255.192D. 255.255.255.1604: You have added a new switch to your network. You want to manage it remotely, so you need to assign it an IP address. Your router that connects to the switch has an IP address of 172.16.12.33/27. Which of the following addresses can you assign to this switch?A. 172.16.12.33/28B. 172.16.12.32/27C. 172.16.12.33/27D. 172.16.12.34/27E. 172.16.12.35/28F. 172.16.12.38/28G. 172.16.12.63/275: The address 172.16.208.16/20 is a host address in which of the following subnets?A. 172.16.176.0–255.255.240.0B. 172.16.192.0–255.255.240.0C. 172.16.208.0–255.255.240.0D. 172.16.224.0–255.255.240.06: You are designing an IP address scheme for your brand new remote office. The vice president of IT calls to tell you that you will be in charge of the 192.168.1.64/26 subnetwork. This supplies you with a single subnetwork with 62 hosts. You need to have at least two subnets with 14 hosts in each subnet. What custom subnet mask should you use?A. 255.255.255.128B. 255.255.255.192C. 255.255.255.224D. 255.255.255.240E. 255.255.255.2487: You have subnetted the 210.106.14.0 network with a /24 mask. Your boss at Acme, Inc. wants to know how many usable subnetworks and usable host addresses per subnet this would provide. What should you tell her?A. One network with 254 hostsB. Two networks with 128 hostsC. Four networks with 64 hostsD. Six networks with 30 hosts8: Identify three valid host addresses in any subnet of the 201.168.27.0 network, assuming a fixed subnet mask of 255.255.255.240. (Choose three.)A. 201.168.27.33B. 201.168.27.112C. 201.168.27.119D. 201.168.27.126E. 201.168.27.175F. 201.168.27.2089: What is the subnetwork address for a host with the IP address 201.100.5.68/28?A. 201.100.5.0B. 201.100.5.32C. 201.100.5.64D. 201.100.5.65E. 201.100.5.31F. 201.100.5.110: Which of the following protocols uses a three-way handshake mechanism to establish sessions?A. TCPB. IPC. UDPD. IPXE. Frame relay11: Which of the following protocols is connection-oriented?A. TCPB. IPC. IPXD. Frame relay12: You are using an application on your Windows 2000 client machines that provides error correction. You need a protocol to provide fast transport. Which protocol should your application use?A. TCPB. IPC. UDPD. SPXE. AppleTalk13: When using TCP, after a session is open, the applications can adjust the number of segments they receive before sending an acknowledgment. This behavior is known as _________.A. MTU adjustmentB. WindowingC. Flexible Send PathD. FCS14: If the destination did not receive a segment, how will the TCP host know to resend the information?A. The ACK received will not include the segment number that was not received.B. The ACK received will include the segment number that was not received.C. The sending host will send a PACK to verify segment receipt.D. The destination host will send a YACK message back to the sending host.15: You are planning on using a single network that supports 208 users. Which IP address class would you choose to be the most efficient?A. Class AB. Class BC. Class CD. Class DE. Class E16: RFC 1918 defines the private IP address ranges. Which of the following IP addresses are considered part of these ranges? (Choose three.)A. 10.23.45.67B. 126.21.34.56C. 172.16.32.1D. 172.31.234.55E. 192.169.4.517: A new network is being designed for your company, Acme, Inc. If you use a Class C IP network, which subnet mask will provide one usable subnet per department while allowing enough usable host addresses for each department specified in the table?DepartmentNumber of UsersCorporate7Customer Support15Financial13HR7Engineering16A. 255.255.255.0B. 255.255.255.192C. 255.255.255.224D. 255.255.255.240E. 255.255.255.24818: Which of these protocols provides data transport, relying on the error correction capabilities of the application itself?A. UDPB. TCPC. SNMPD. ICMP19: Which of the following are used by TCP to ensure reliable delivery of data? (Choose two.)A. MAC address resolutionB. Sequence numbersC. AcknowledgmentsD. PingE. Routing updates20: You discover that you are able to adjust the window size of the TCP segment. You increase the window size to test the results. What will you observe happening on your network?A. Increased throughputB. Decreased throughputC. Increased latencyD. Decreased reliability21: Your organization is using the 192.168.1.0/24 address space. You need 28 subnets. What subnet mask would you use to create these subnets?A. 255.255.255.0B. 255.255.255.128C. 255.255.255.192D. 255.255.255.224E. 255.255.255.240F. 255.255.255.24822: Which of the following protocols maps IP addresses to MAC addresses for connectivity to occur between two hosts?A. ARPB. RARPC. SLARPD. DHCP23: Your junior network administrator cannot seem to ping a host in another network and asks you why it isn't working. Which of the following is not an answer that you would give him?A. The host's default gateway is down.B. The destination host is not powered on.C. The IP address of the router interface is incorrect.D. The IP address of the switch to which the destination host connects is incorrect.E. The host is in a different subnet.24: Which of the following classes of IP addresses is utilized for multicasting?A. Class AB. Class BC. Class CD. Class D25: You give your IT department a spreadsheet of IP addresses and their subnets. You receive a call from one of the junior techs asking what the /26 means next to the IP addresses. You tell her:A. It represents the number of hosts possible on that subnetwork.B. It represents the number of subnetworks that are being used.C. It represents the class of IP address being used.D. It represents the number of bits in the subnet mask that are 1.26: You are given an IP network of 192.168.5.0 and told that you need to separate this network into subnetworks that can support a maximum of 16 hosts per subnet. This will help alleviate congestion on the network. What subnet mask can you use to create the subnets necessary to meet the given criteria?A. 255.0.0.0B. 255.255.0.0C. 255.255.255.0D. 255.255.255.224E. 255.255.255.24027: Which of the following would a Class A network be assigned to?A. Government agencyB. Small-to-medium sized corporationC. SOHOD. An individual28: A client has the IP address 192.168.5.98/27. Which of the following addresses are on the same subnet as this host? (Choose two.)A. 192.168.5.95B. 192.168.5.100C. 192.168.5.128D. 192.168.5.11029: Which of the following IP addresses is not a public IP address that can be routed over the Internet?A. 2.3.4.5B. 11.12.13.14C. 165.23.224.2D. 172.31.45.34E. 203.33.45.2230: You are given a Class B network. What is the default subnet mask assigned to the Class B network?A. 255.255.255.255B. 255.255.0.0C. 255.224.0.0D. 0.0.0.031: You are troubleshooting your router's interfaces. For some reason, the Ethernet interface will not accept the IP address of 192.168.5.95/27 that you've assigned. Which of the following explains the router's refusal to take the IP address?A. Class C addresses cannot be assigned to Ethernet interfaces.B. The /27 is an invalid mask.C. It is a broadcast address.D. It is a public IP address.E. It is a private IP address.32: You are a network technician at Acme, Inc. You are required to divide the 172.12.0.0 network into subnets. Each subnet must have the capacity of 458 IP addresses. Also, according to the requirements, you must provide the maximum number of subnets. Which subnet mask should you use?A. 255.255.255.254B. 255.255.254.0C. 255.255.240.254D. 255.255.0.033: What is the subnetwork and broadcast IP address of 192.168.2.37 with the subnet mask of 255.255.255.248?A. 192.168.2.24/192.168.2.31B. 192.168.2.32/192.168.2.39C. 192.168.2.40/192.168.2.47D. 192.168.2.48/192.168.2.55E. 192.168.2.56/192.168.2.6334: One of your co-workers at Acme, Inc., needs to convert the binary number 11011010 into a decimal. What is the decimal equivalent?A. 218B. 219C. 220D. 221E. 22235: One of your co-workers at Acme, Inc., needs to convert the binary number 01011010 into a decimal. What is the decimal equivalent?A. 75B. 83C. 90D. 9736: One of your co-workers at Acme, Inc., needs to convert the binary number 11010110 into a decimal. What is the decimal equivalent?A. 198B. 214C. 252D. 25537: One of your co-workers at Acme, Inc., needs to convert the binary number 10110110 into a decimal. What is the decimal equivalent?A. 182B. 192C. 202D. 21238: You are configuring a subnet for the Acme, Inc., branch office in Beijing. You need to assign IP addresses to hosts in this subnet. You have been given the subnet mask of 255.255.255.224. Which of these IP addresses would be valid? (Choose three.)A. 15.234.118.63B. 92.11.178.93C. 134.178.18.56D. 192.168.16.87E. 201.45.116.159F. 217.63.12.19239: You are a network technician at Acme, Inc. You have subnetted the 208.98.112.0 network with a /28 mask. Your boss asks you how many usable subnetworks and usable host addresses per subnet this will provide. What should you tell her, assuming your router is using ip subnet-zero?A. 62 networks and 2 hostsB. 6 networks and 30 hostsC. 8 networks and 32 hostsD. 16 networks and 16 hostsE. 16 networks and 14 hosts40: What is a disadvantage of using a connection-oriented protocol such as TCP?A. Packet acknowledgment might add overhead.B. Packets are not tagged with sequence numbers.C. Loss or duplication of data packets is more likely to occur.D. The application layer must assume responsibility for the correct sequencing of the data packets.41: You are a network technician at Acme, Inc. You have subnetted the 192.168.72.0 network with a /30 mask for connections between your routers. Your boss asks you how many usable subnetworks and usable host addresses per subnet this will provide. What should you tell her, assuming your router cannot use ip subnet-zero?A. 62 networks and 2 hostsB. 6 networks and 30 hostsC. 8 networks and 32 hostsD. 16 networks and 16 hostsE. 14 networks and 14 hosts42: Which of the following IP addresses are considered "network" addresses with a /26 prefix? (Choose two.)A. 165.203.2.0B. 165.203.5.192C. 165.203.6.63D. 165.203.6.191E. 165.203.8.25543: Identify three valid hosts in any subnet of 192.168.32.0, assuming the subnet mask used is 255.255.255.240. (Choose three.)A. 192.168.32.33B. 192.168.32.112C. 192.168.32.119D. 192.168.32.126E. 192.168.32.175F. 192.168.32.20844: A Class C network address has been subnetted with a /27 mask. Which of the following addresses is a broadcast address for one of the resulting subnets?A. 198.57.78.33B. 198.57.78.64C. 198.57.78.97D. 198.57.78.97E. 198.57.78.159F. 198.57.78.25445: What is the subnetwork address for a host with IP address 165.100.5.68/28?A. 165.100.5.0B. 165.100.5.32C. 165.100.5.64D. 165.100.5.65E. 165.100.5.31F. 165.100.5.146: Your boss wants to know what TCP stands for. What do you tell him?A. Transmission Check ProtocolB. Transport Check ProtocolC. Transmission Control ProtocolD. Transport Control Protocol47: Your boss wants to know what UDP stands for. What do you tell him?A. Unreliable Data ProtocolB. Unreliable Data ProgramC. User-Defined ProtocolD. User Datagram Protocol48: Which of the following statements accurately describes UDP?A. UDP copies files between a computer and a system running rshd, the remote shell service (daemon).B. UDP is a member of the TCP/IP suite of protocols that governs the exchange of electronic mail between message transfer agents.C. UDP is a member of the TCP/IP suite of protocols and is used to copy files between two computers on the Internet. Both computers must support their respective roles: one must be a client, and the other a server.D. UDP is a TCP complement that offers a connectionless datagram service guaranteeing neither delivery nor correct sequencing of delivered packets (much like IP).49: Which of the following host addresses are members of networks that can be routed across the public Internet? (Choose three.)A. 10.20.12.64B. 172.16.32.129C. 172.64.32.34D. 192.168.23.252E. 196.104.12.95F. 214.192.48.25450: You are connecting your Serial 0/1 interface to the Internet. Which of the following need to be done for the connection to work? (Choose two.)A. Assign a public IP address.B. Use the shutdown command.C. Use the no shutdown command.D. Make sure the interface is running in full-duplex.。

Cisco简单练习题1. 问题描述请回答以下10个简单问题：1) Cisco是一家什么类型的公司？2) Cisco以哪个领域的产品和服务而闻名？3) Cisco的总部位于哪个城市？4) Cisco于哪一年成立？5) Cisco的创始人是谁？6) Cisco是什么意思？7) Cisco的主要产品有哪些？8) Cisco致力于提供哪些解决方案？9) Cisco的商标颜色是什么颜色？10) Cisco的口号是什么？2. 答案解析1) Cisco是一家网络技术公司。

2) Cisco以网络设备和解决方案而闻名。

3) Cisco的总部位于美国加利福尼亚州旧金山市。

4) Cisco于1984年成立。

5) Cisco的创始人是莱纳德·博斯克（Leonard Bosack）和桑妮娅·罗斯（Sandy Lerner）。

6) Cisco是Computer Information System Company的缩写，意为计算机信息系统公司。

7) Cisco的主要产品包括路由器、交换机、安全设备、云计算解决方案等。

8) Cisco致力于提供网络连接、安全、通信和合作解决方案。

9) Cisco的商标颜色为蓝色。

10) Cisco的口号是"We Make the Internet Work"（我们使互联网运行）。

总结本文介绍了Cisco简单练习题的题目及答案解析。

通过回答这些问题，读者可以了解到Cisco的基本信息，包括公司类型、产品和服务、总部所在地、成立时间、创始人、商标颜色以及口号等。

这些知识对于了解Cisco以及其在网络技术领域的重要性具有一定的帮助。

1、什么是VPN？答：VPN的英文全称是“Virtual Private Network”，翻译过来就是“虚拟专用网络”。

顾名思义，虚拟专用网络可以把它理解成是虚拟出来的企业内部专线。

VPN是让外网访问内网的通道。

正常情况下外网是无法访问内网的，而VPN 就可以让外网的用户虚拟成内网的用户，实现内外网互访。

2、VPN有什么特点和缺点答：优点：与传统的广域网相比，虚拟专用网能够减少运营成本以及降低远程用户的连接成本。

缺点：基于互联网的虚拟专用网的可靠性和性能不再企业的直接控制之下。

优点：虚拟专用网提供一个高水平的安全，使用高级的加密和身份识别协议防止数据被窥探，防止数据窃贼和其它非授权的用户窥探数据。

优点：设计良好的宽带虚拟专用网是模块化的和伸缩性的。

缺点：不同厂商的虚拟专用网产品和解决方案并不是总是相互兼容的，因为许多厂商不愿意或者没有能力遵守虚拟专用网技术标准。

因此，设备的混合搭配可能引起技术难题。

另一方面，使用一家供应商的设备也许会增加成本。

优点：虚拟专用网能够让移动员工、远程办公人员、业务合作伙伴和其他人利用本地可用的、高速宽带接入技术访问公司的网络，如DSL、线缆和wifi等技术。

此外，高速宽带连接为连接远程办公室提供一个节省成本的方法。

缺点：虚拟专用网在与无线设备一起使用时会产生安全风险。

优点：可以降低成本部署灵活方便管理方式简单安全可实现移动办公缺点：无专线好3、VPN有几种类别?答：按实用技术不同又分为以下类别pptp vpn ,l2tp vpn ,ipsec vpn, sslvpn ,mpls vpn 等等目前通过Wi-Fi Protected Setup认证的产品能够为用户提供两种实现方式：按钮配置（Push Button Configuration，PBC）输入PIN码（Pin Input Configuration，PIN）TCL脚本考察：名称llength - 计算列表的元素个数语法llength list描述将list当作一个列表来处理并返回一个十进制数的字符串表示列表中元素的个数。

Cisco网络类试题网络试题笔试部分1、将网络172.25.0.0划分为8个主机数相同的子网，在路由器上已经配置了ip subnet-zero 的命令，下面这些地址中，那些是属于第三个子网的？（选择三个正确答案）（ acd ）A. 172.25.78.243B. 172.25.98.16C. 172.25.72.0D. 172.25.94.255E. 172.25.96.17F. 172.25.100.162、如果下面这些问题真实的发生在公司的路由器上：（ b ）1）Flash中的IOS镜像丢失2）没有网络连接是可用的3）路由器的fallback IOS镜像被损坏了Cisco 2600系列路由器在启动的过程中会怎么样？A. 路由器进入Setup mode.B. 路由器进入ROM monitor mode.C. 路由器进入global configuration mode.D. 启动将中止，直到IOS可用.3、网络管理员可以使用哪些命令同时检查RIP，IGRP，EIGRP和OSPF路由协议的配置？（选择两个正确答案）（）A. debug ip routingB. show running-configC. show ip route protocolsD. show ip protocolsE. show protocols all4、在以太网中，下列哪些条件可能导致网络拥塞？（选择两个正确答案）（）A. The use of Full-Duplex Mode.B. The Creation on New Collision Domains.C. The Creation on New Broadcast Domains.D. The Addition of Hubs to the Network.E. The use of switches in the Network.F. The Amount of ARP or IPX SAP Traffic.5、IEEE制订的Gigabit以太网标准？（选择两个正确答案）（）A. 802.11B. 802.5C. 802.3abD. 802.3aeE. 802.3zF. 802.3u6、公司网络的5个路由器如下图连接：（）Router A将发送数据到Router E，下面这些描述中，哪些是正确的？（选择三个正确答案）A. Router A will determine that all paths have an equal cost if RIP is the routingprotocol.B. Router A will install only the ADE path in its routing table if RIP is the routingprotocol.C. Router A will determine that path ACE has the lowest cost if IGRP is the routingprotocol.D. Router A will determine that path ADE has the lowest cost if IGRP is the routingprotocol.E. Router A will use the route information learned by IGRP if both RIP and IGRPare configured on router A.F. Router A will use the route information learned by RIP if both RIP and IGRP areconfigured on router A.7、哪一条命令能够显示拓扑和路由表中数据包和EIGRP处理内容？（）A. debug ip eigrpB. debug eigrp packetC. show ip eigrp topologyD. show ip eigrp interface8、使用网络命令EIGRP的目的是什么？（）A. to determine which router interfaces participate in EIGRP and which networks the router advertisesB. to specify the autonomous system number to which the router belongsC. to define the EIGRP neighborsD. to tell EIGRP which networks to advertise, those directly connected and thoselearned through EIGRP9、哪一条OSPF show命令可以描述OSPF邻接关系？（）A. show ip ospf interfaceB. show ip ospfC. show ip routeD. show ip ospf neighbor10、三台路由器连接到以太网的局域网中，你如何保证一台小路由器不能成为DR或BDR的角色？（）A. Set the interface priority to 100.B. Set the interface priority to 0.C. Leave the interface priority set to 1 and set the priority of the other two routersto 10.D. Use the no designated-router command on the Ethernet interface.11、哪一条命令你能够总结routes从ABR到area 0？（）A. summary-addressB. area x rangeC. networkD. area x summary12、使用virtual link的三个原因?（选择三个正确答案）（）A. temporary backup purposesB. temporary connection due to network moves or changesC. building a permanent backboneD. backup of a disconnected area 013、哪两个特征用来描述IS-IS?（选择两个正确答案）（）A. It is an Interior Gateway Protocol (IGP).B. It is an Exterior Gateway Protocol (EGP).C. It is efficient in its use of network resources.D. It is an advanced distance vector routing protocol.14、什么命令能够查看participating in IS-IS? （）A. show clns protocolB. show clns interfaceC. show isis routeD. show isis database15、哪一条命令能够显示IS-IS邻居路由？（）A. show ip protocolsB. show clns protocolsC. show ip route isisD. show ip route16、网络中从一种路由协议换为另一种路由协议，那三种方案最好？（选择三个正确答案）（）A. access listsB. NAT translationsC. host addressingD. WAN connection type17、哪一种路由方式用来描述BGP路由协议最恰当？（）A. distance vectorB. link-stateC. path-vectorD. hybrid of link-state and distance vector18、哪两个网络特性适用VLANs？（选择两个正确答案）（）A. All devices in a VLAN are members of the same broadcast domain.B. The most common type of VLAN is a protocol VLAN.C. VLAN membership is most commonly based on a switch port number.D. A VLAN is the same as a physical subnet.19、选择一条命令显示端口信息来检查ISL trunk配置。

二、单选题1、 ADSL MODEM不能激活，打一个电话或振一下铃就好了，其原因可能是A、分离器损坏;B、modem工作不稳定;C、电话机有问题;D、线路接触面氧化;答案为d6、172.16.99.99/255.255.192.0 的广播地址是什么?A、172.16.99.255;B、172.16.127.255;C、172.16.255.255;D、172.16.64.127; 答案为b7、190.233.27.13./16所在网段地址A、190.233.0.0;B、190.0.0.0;C、190.233.27.0;答案为a8、224.0.0.5代表的是（）地址。

A、主机地址;B、广播地址;C、网络地址;D、组播地址;答案为d10、ATM协议工作在________层。

A、物理层;B、链路层;C、网络层;D、传输层;答案为b11、ATM信元是定长的，而且信元的长度较小，只有（）字节。

A、33;B、43;C、53;D、63;答案为c23、DHCP客户端申请一个新的IP地址之前，使用的初始IP地址是________。

A、0.0.0.0;B、127.0.0.1;C、255.255.255.255;D、169.254.1.1 ;答案为a24、DNS工作于（）A、网络层 ;B、传输层;C、会话层;D、表示层;E、应用层;答案为e26、D类地址的缺省子网掩码有（）位A、8;B、16;C、24;D、 None;答案为d28、FDDI 使用的是（）局域网技术A、以太网;B、快速以太网;C、令牌环;D、令牌总线;答案为c29、IEEE 802.4是下面哪一种局域网标准？正确的选项是A、以太网;B、生成树;C、令牌环;D、令牌总线;答案为d30、IEEE于1999年颁布了用以标准化VLAN实现方案的________协议标准草案。

A、802.1B;B、802.1D;C、802.1P;D、802.1Q;答案为d32、IP报文头中固定长度部分为多少字节？A、10;B、20;C、30;D、40;答案为b33、IP报文中一部分字段专门用来描述报文的生命周期，即TTL值，它的最大值是________。

ccna测试题及答案CCNA测试题及答案一、选择题1. 在Cisco设备上，以下哪个命令用于查看当前的路由表？A. show ip routeB. show running-configC. show interface statusD. show version答案：A2. 以下哪个协议用于在网络中自动发现其他设备？A. ARPB. CDPC. ICMPD. TCP答案：B3. 以下哪个命令用于配置Cisco设备上的接口？A. configure terminalB. interfaceC. ip addressD. hostname答案：A二、填空题4. 在Cisco设备上，使用命令_________可以查看接口的配置信息。

答案：show interface5. 静态路由配置中，_________命令用于指定下一跳地址。

答案：ip route6. 动态路由协议可以自动适应网络变化，其中_________是最常见的一种。

答案：RIP（路由信息协议）三、简答题7. 请简述VLAN（虚拟局域网）的作用。

答案：VLAN是一种将局域网内不同物理位置的设备划分为同一逻辑网络的技术，主要用于隔离广播域，提高网络的安全性和效率。

8. 描述交换机和路由器在网络中的基本功能。

答案：交换机主要用于局域网内部，通过MAC地址表来转发数据帧，实现数据包在局域网内的快速交换。

路由器则工作在网络层，使用IP地址来转发数据包，连接不同的网络，并进行路径选择。

四、计算题9. 假设一个子网掩码为255.255.255.192，计算这个子网的可用IP地址范围。

答案：可用IP地址范围为192.168.1.0到192.168.1.62（包含两端）。

五、实验题10. 请根据以下配置文件，列出Router1的接口配置信息。

```Router1show running-configinterface FastEthernet0/0ip address 192.168.1.1 255.255.255.0duplex autospeed auto!interface FastEthernet0/1no ip addressshutdown!interface Serial0/0/0ip address 10.0.0.1 255.255.255.252clock rate 64000!router ospf 1network 192.168.1.0 0.0.0.255 area 0network 10.0.0.0 0.0.0.3 area 0!```答案：- FastEthernet0/0: IP地址为192.168.1.1，子网掩码为255.255.255.0，双工模式和速度均为自动。