CISCO-CCNA网络工程师题库

1、培训大讲堂官方 YY 频道：3660mCCNA 题库考试代号：640-802考试时间：英文 110+30=140 分钟通过分数：825题库版本：V104.4鸿鹄论坛招募 CCNA、CCNP 答疑讲师答疑地点：鸿鹄官方 YY 频道 3660鸿鹄大讲堂：http:/ 题库战报交流 QQ 群：144288127（ 500 人超级群）CCNA 题库战报交流区：http:/ G 视频教程免费下载：http:/ 640-802）题库 V104.4CCNA（ 640-802）题库 V104.4 （情人节版）CCNA 题库战报 500 人超级 QQ 群 144288127V104 系列是官方的终结版本，以后不

2、会再出 V105 V106 V108 等等CCNA 最新题库 /最新战报 发布区：http:/ 考试报名 1900,详情请联系鸿鹄全国区十七名客服QQ712023090-712023106更新内容：V104.1 修正 V104 中错误题目，确定经典争议题目答案；V104.2 增加拖图题并可完美模拟考试，VCE 题库增加中文注释；V104.3 针对思科 CCNA 考试变题，更新考试新增题目93Q，更新V104.2 实验题；V104.4 增加全文中文注释，汇总V104.3 九次更新， 删除部分旧题目， 为目前最新官方正版题库；2011.8.1 增加每日新题，修订部分错误。2012.2.14 情人节

3、版增加 5 道新题，分别是 519、520、521、522、523 题修改 176 题、375 题、443 题、482 题答案错误修改 59 题、88 题、453 题、107 题、270 题注释错误增加个别疑难拖图题注释，优化实验题QUESTION 1When you are logged into a switch, which prompt indicates that you are inprivileged mode?（当您登录到交换机，哪种提示表明你在特权模式？）A. %B. C. D. $E. #An swer: ESection: Chapter 4: Introduction

4、to Cisco IOSExpla nati on/Refere nee:特权模式就是#提示符QUESTION 2Which comma nd shows system hardware and software version in formation?（哪些命令显示系统硬件和软件的版本信息？）A. show con figurati onB. show environmentC. show inven toryD. show platformE. show versionAn swer: ESection: Chapter 4: Introduction to Cisco IOSExpla

5、 nati on/Refere nee:查看系统的软件和硬件信息使用的命令是show versionQUESTION 3Cisco Catalyst switches CA T1 and CAT2 have a conn ecti on betwee nthem using ports FAO/13. An 802. 1Q trunk is con figured betwee n the twoswitches. On CAT1, VLAN 10 is chosen as native, but on CAT2 the nativeVLAN is not specified.What wil

6、l happen in this seenario?(思科 Catalyst 交换机 CAT1 和 CAT2 有它们之间的连接使用端口 FA0/13。两个交换机之间用 802.1Q 中继配置，CAT1 做为 VLAN10 的 主机， 但在 CAT2 上的本地 VLAN未指定。在这种情况下会发生什 么？)A. 802.1Q gia nts frames could saturate the link.B. VLAN 10 on CAT1 and VLAN 1 on CA T2 will se nd un tagged frames.C. A n ative VLAN mismatch error

7、 message will appear.D. VLAN 10 on CA T1 and VLAN 1 on CA T2 will send tagged frames.An swer: CSection: Chapter 10: VLANExpla nati on/Refere nee:如果两边 native 不匹配的话.switch 将报 native 不匹配的日志信息QUESTION 4Which comma nd would correctly con figure a serial port on a router with thelast usable host address i

8、n the 2/29 sub net?(哪个命令正确地将最后的可用主机地址，2/29 子网的路 由器上配置的串行端口？)A. Router(config-if)# ip address 8 40B. Router(config-if)# ip address 9 24C. Router(config-if)# ip address 3 48D. Router(config-if)# ip addre

9、ss 9 48E. Router(config-if)# ip address 3 48F. Router(c on fig-if)# ip address 8 48An swer: FSection: Chapter 4: Introduction to Cisco IOSExpla nati on/Refere nee:2/29 它的块大小为 8 掩码为 48 地址范围为192.216.32.

10、32-39 QUESTION 5The network default gateway applying to a host by DHCP is3/28. Which option is the valid IP address of this host?(应用到由 DHCP 主机的网络默认网关是 3V28。哪个选项是有效的主机 IP 地址？)A. 5B. 7C. 0D. 2E. 4An swer: CSection: Chapter 3:

11、 IP Addressing and VLSMExpla nati on/Refere nee:考点：考查 VLSM3/28 所在网段的范围是 2-7/28A :超出范围B :广播地址C:正确D :网络号E:超出范围QUESTION 6Which two addresses can be assig ned to a host with a sub net mask of? (Choose two.)哪两个地址可以分配给与子网掩码 的主机？A. B. 186

12、.54.3.0C. 55D. 55E. An swer: BDSection: Chapter 3: IP Addressing and VLSMExpla nati on/Refere nee:考点：考查 VLSMA :网络号B/D :正确C:广播地址E:网络号QUESTION 7The network administrator has asked you to check the status of theworkstations IP stack by pinging the loopback address. Which ad

13、dresswould you ping to perform this task?网络管理员已要求您通过ping 环回地址检查工作站的IP 堆栈的状态。您要执行此任务将ping 哪个地址？A. B. C. D. An swer: BSection: Chapter 3: IP Addressing and VLSMExpla nati on/Refere nee:考点：使用 ping 来检测主机的 IP 栈。pi ng 实现。QUESTION 8Workstati on A has been assi

14、g ned an IP address of 4/28.Workstation B has been assig ned an IP address of 00/28. Thetwo workstati ons are conn ected with a straight-through cable. Attempts toping between the hosts are unsuccessful. What two things can be done toallow com muni catio ns betwee n the hosts? (Cho

15、ose two.)A 工作站已分配 IP 地址为 4V28。B 工作站已分配 IP 地 址为 00V28。两台工作站与直通电缆连接。在主机之间ping不成功。允许在主机之间的通信，可以做两件事情？(选择两个)。A. Replace the straight-through cable with a crossover cable.B. Change the sub net mask of the hosts to /25.C. Change the sub net mask of the hosts to /26.D. Change the address

16、of Workstation A to 5.E. Change the address of Workstation B to 11.An swer: ABSection: Chapter 3: IP Addressing and VLSMExpla nati on/Refere nee:考点：同构设备使用交叉线，两端的IP 需要在同一个子网。A :使用交叉线替换现有的直通线。正确。B :修改掩码为 25 位，正确。C:修改掩码为 26 为，错误。不能使他们在同一个子网。D/E :错误，都不能使他们在同一个子网。QUESTION 9Your ISP has

17、give n you the address /29 to assig n to yourrouters in terface. They have also give n you the default gateway addressof . After you have con figured the address, the router is un ableto pi ng any remote devices. What is preve nti ng the router from pi ngi ngremote devices?（您的 IS

18、P 给你要分配给您的路由器接口地址V29。他们还授予您是 的默认网关地址。您已配置了地址后，路由器是无法 ping 任何远程设备。 什么在阻碍 pinging 远程设备的路由 器？）A. The default gateway is not an address on this sub net.B. The default gateway is the broadcast address for this sub net.C. The IP address is the broadcast address for this sub net.D. The

19、IP address is an in valid class D multicast address.An swer: BSectio n: Chapter 3: IP Addressi ng and VLSMExpla nati on/Refere nee:考点：考查 VLSM。/29 所在网段的范围是：-/29A :默认网关不属于这个子网，错误B :默认网关是这个子网的广播地址，正确C:这个地址是子网的广播地址，错误D :这个地址是组播地址，错误。QUESTION 10Which comma nd is used to copy

20、 the con figurati on from RAM intoNVRAM?哪个命令用于从 RAM 复制到 NVRAM 的配置A. copy runnin g-c onfig startup-c onfigB. copy startup-c on fig: runnin g-c on fig:C. copy running config startup configD. copy startup config running configE. write termi nalAn swer: ASectio n: Chapter 4: In troduction to Cisco IOSEx

21、pla nati on/Refere nee:QUESTION 11Which comma nd is used to load a con figurati on from a TFTP server andmerge the con figurati on into RAM?（哪些命令用于从 TFTP 服务器加载配置或合并到RAM 的配置？）A. copy runnin g-c on fig: TFTP:B. copy TFTP: runnin g-c onfigC. copy TFTP: startup-c onfigD. copy startup-c on fig: TFTP:An s

22、wer: BSectio n: Chapter 4: In troduction to Cisco IOSExpla nati on/Refere nee:QUESTION 12A system adm ini strator types the comma nd to cha nge the host name of arouter. Where on the Cisco IFS is that cha nge stored?A. NVRAMB. RAMC. FLASHD. ROME. PCMCIAAn swer: BSectio n: Chapter 4: In troduction to

23、 Cisco IOSExpla nati on/Refere nee:running-eonfig 保存在 RAM 中startup-eonfig 保存在 NVRAM 中QUESTION 13Which comma nd is used to con figure a default route?A. ip route B. ip route 172.1621C. ip route D. ip route 0.0.0.

24、0 An swer: DSectio n: Chapter 6: IP Rout ingExpla nati on/Refere nee:QUESTION 14If IP routi ng is en abled, which two comma nds set the gateway of lastresort to the default gateway? （如果启用了 IP 路由，哪两个命令设置网关的最后到默认网关？）（Choose two.）A. ip default-gateway B. ip route 0.0

25、.0.0 C. ip default -n etwork D. ip default-route E. ip route An swer: CESectio n: Chapter 6: IP Rout ingExpla nati on/Refere nee:产生默认网关的两种方式ip default-n etworkip routeQUESTION 15Which comma nd would you con figure globally on a Cisco

26、router that wouldallow you to view directly connected Cisco devices?（该命令将全局上配置使您可以直接查看的 Cisco 路由器连接 Cisco 设备吗？）A. en able cdpB. cdp en ableC. cdp runD. run cdpAn swer: CSecti on: Chapter 5: Managing Cisco IOSExpla nati on/Refere nee:QUESTION 16Which comma nd is used to see the path take n by packets

27、 across an IP network?（哪些命令用于看到通过 IP 网络数据包所采取的路径？）A. show ip routeB. show routeC. tracerouteD. trace ip routeAn swer: CSectio n: Chapter 2: TCP/IPExpla nati on/Refere nee:哪条命令用于查看数据包转发所经过的路径A:查看路由表B :没有这条命令C:正确D :没这条命令QUESTION 17Which comma nd is used to debug a ping comma nd?哪些命令用于调试ping 命令？ A. deb

28、ug icmpB. debug ip icmpC. debug tcpD. debug packetAn swer: BSecti on: Chapter 5: Managing Cisco IOSExpla nati on/Refere nee:ping 调用了 icmp 协议，而 icmp 数据包封装在 ip 包中。QUESTION 18Which comma nd displays CPU utilizati on?哪个命令显示的CPU 利用率呢？A. show protocolsB. show processC. show systemD. show versi onAn swer:

29、BSecti on: Chapter 5: Managing Cisco IOSExpla nati on/Refere nee:查看 CPU 利用率。QUESTION 19When con figuri ng a serial in terface on a router, what is the default encapsulati on?在配置一个串行接口的路由器，什么是默认的封装？A. atm-dxiB. frame-relayC. hdlcD. lapbE. pppAn swer: CSection: Chapter 14: Wide Area Network (W AN)Expl

30、a nati on/Refere nee:缺省封装是 HDLCQUESTION 20What must be set correctly whe n con figuri ng a serial in terface so thathigher-level protocols calculate the best route?什么时， 必须设置正确配置串行接口， 以便更高级别的协议计算最佳 路线？A. ban dwidthB. delayC. loadD. reliabilityAn swer: ASectio n: Chapter 6: IP Rout ingExpla nati on/Re

31、fere nee:为了使高层路由协议计算最佳路由，串口的什么东西必须被设置正确？在接口下，只有带宽是可以配置的。QUESTION 21A compa ny impleme nts video conferencing over IP on their Ether net LAN.The users no tice that the n etwork slows dow n, and the video eitherstutters or fails completely. What is the most likely reas on for this?公司对他们的以太网LAN ip 实现视频

32、会议。用户注意网络变慢，和视频断断续续或完全失败。最有可能的原因是什么？A. mi nimum cell rate (MCR)B. quality of service (QoS)C. modulati onD. packet switch ing excha nge (PSE)E. reliable tran sport protocol (RTP)An swer: BSecti on: Chapter 9: Switch ingExpla nati on/Refere nee:考点：当网络中使用视频会议后发现网络非常慢，什么原因引起的？QoS:用于定制策略对不同流量进行控制。QUESTIO

33、N 22Which layer in the OSI reference model is responsible for determining theavailability of the receivi ng program and check ing to see if eno ughresources exist for that com mun icati on?OSI 参考模型在哪一层负责确定接收程序的可用性和检查足够的资 源，是否存在该通信？A. tran sportB. n etworkC. prese ntati onD. sessi onE. applicati onAn

34、 swer: ESecti on: Chapter 1: In troduct ionExpla nati on/Refere nee:哪一层确定的接收程序的可用性？应用层提供QUESTION 23Data tran sfer is slow betwee n the source and dest in atio n. The quality ofservice requested by the tran sport layer in the OSI refere nee model is notbeing maintain ed. To fix this issue, at which l

35、ayer should the troubleshooting process begi n?数据传输速度慢的源和目标之间。 不保持在 OSI 参考模型的传输层所要求的服务质量。要解决此问题，在哪一层应故障排除过程开始？A. prese ntati onB. sessi onC. tran sportD. n etworkE. physicalAn swer: DSecti on: Chapter 1: In troduct ionExpla nati on/Refere nee:解决网络问题，先确保网络层通信。QUESTION 24Which protocols are found in t

36、he n etwork layer of the OSI reference modeland are resp on sible for path determ in ati on and traffic switch ing?哪些协议在网络层 OSI 参考模型中找到，负责路径测定和交通切换？A. LANB. routi ngC. WAND. n etworkAn swer: BSecti on: Chapter 1: In troduct ionExpla nati on/Refere nee:OSI 网络层中什么提供了路径选择和流量转发？由路由协议提供。通过手工或者动态学习路由条目实现。

37、QUESTION 25Which comma nd reveals the last method used to powercycle a router?A. show reloadB. show bootC. show runnin g-c onfigD. show versi onAn swer: DSecti on: Chapter 5: Managing Cisco IOSExpla nati on/Refere nee:哪一个命令可以显示最近一次被用来重启路由器的方法？QUESTION 26Which three optio ns are valid WAN conn ectivi

38、ty methods? (Choose three.)A. PPPB. WAPC. HDLCD. MPLSE. L2TPv3F. ATMAn swer: ACFSection: Chapter 14: Wide Area Network (W AN)Expla nati on/Refere nee:哪三种封装属于 WAN 链路的？A:点到点协议，正确B :无线加密技术，错误C:思科缺省封装格式，正确。 D:多协议标签转换，错误E:隧道协议，错误F:正确。QUESTION 27Refer to the exhibit. Which WAN protocol is bei ng used?irir

39、err* posa/o/o it up, 11n prococol 1$ up1s Packer flver丹rtn电电pjHv#(1&( (eeScrtfbl*LMI trfl244MS, L*KtoidcuE qutu 0broidciscfidroppedL“t input 00:00:00 output D0:00:00 output Lt clearing ofiho* interf*c countri i、SnpuX ratt 0 05 Hinvt# QVtpul n亡J4000 &1tS/5CC 631(36 packets Input.对肿珥口Rfceivtd

40、0 brgde平“呐t 0 rum轧0 9lanrs qk 甲那eV 0 pirKy斥刁J J447 J npuT frtrX3 VtlM CftC * 00overrun,027 4bCZpickets out put *byts, 0 und*rrurt0 mt put f rr ori, 0 applique, Q fncerf resets0 output buffer fAttures 0 output ixifrrsout0 carrier trim icioru:Up4upVjHctrfleft braidcutiLI2571A. ATMB. HDLCC. Frame Relay

41、D. PPPAn swer: CSection: Chapter 14: Wide Area Network (W AN)Expla nati on/Refere nee:由图中的红线可看到发送接受LMI 信息。属于 FR 的数据包。QUESTION 28What is the differe nee between a CSU/DSU and a modem?【一个 CSU/DSU 和调制解调器之间的区别是什么？】A. A CSU/DSU con verts an alog sig nals from a router to a leased line; amodem con verts a

42、n alog sig nals from a router to a leased line.B. A CSU/DSU con verts an alog sig nals from a router to a phone line; amodem con verts digital sig nals from a router to a leased line.C. A CSU/DSU con verts digital sig nals from a router to a phone line; amodem con verts an alog sig nals from a route

43、r to a phone line.D. A CSU/DSU con verts digital sig nals from a router to a leased line; amodem con verts digital sig nals from a router to a phone line.An swer: DSection: Chapter 14: Wide Area Network (W AN)Expla nati on/Refere nee:CSU/DSU 一般是专线，MODEN 是将模拟信号与数字信号转换QUESTION 29A n etwork admi nistra

44、tor must con figure 200 switch ports to accept trafficfrom only the curre ntly attached host devices. What would be the mostefficie nt way to con figure MAC-level security on all these ports?A. Visually verify the MAC addresses and the n telnet to the switches to enter the switchport-port security m

45、ac-address comma nd.B. Have end users e-mail their MAC addresses. Telnet to the switch to enter the switchport-port security mac-address comma nd.C. Use the switchport port-security MAC address sticky comma nd on allthe switch ports that have end devices connected to them.有端设备连接到他们的所有交换机端口上使用交换机端口端口

46、安全MAC 地址粘滞命令。D. Use show mac-address-table to determ ine the addresses that areassociated with each port and then en ter the comma nds on each switch forMAC address port-security.An swer: CSecti on: Chapter 9: Switch ingExpla nati on/Refere nee:考点：有 200 台主机需要接入，采用什么方式来增强网络安全性？A :先验证 mac 安全性，然后在交换机上绑

47、定。错误，工作量太大B :用户发送邮件认证再在交换机上配置，错误，不科学。C:使用 port-security，正确。D :错误，工作量太大。QUESTION 30When troubleshooting a Frame Relay connection, what is the first stepwhen performing a loopback test?!帧中继连接故障排除时，执行环回测试时的第一步是什么？】A. Set the en capsulati on of the in terface to HDLC.B. Place the CSU/DSU in local-loop m

48、ode.C. En able local-loop mode on the DCE Frame Relay router.D. Verify that the en capsulati on is set to Frame Relay.An swer: ASection: Chapter 14: Wide Area Network (W AN)Expla nati on/Refere nee:在对 FR 进行排错的时候，当做回环测试的时候，第一步如何处理？A :讲接口配置成 HDLC，正确，FR 封装下无法正常 ping 自己端口QUESTION 31What occurs on a Fram

49、e Relay n etwork whe n the CIR is exceeded?A. All TCP traffic is marked discard eligible.B. All UDP traffic is marked discard eligible and a BECN is sent.C. All TCP traffic is marked discard eligible and a BECN is sent.D. All traffic exceed ing the CIR is marked discard eligible.An swer: DSection: C

50、hapter 14: Wide Area Network (W AN)Expla nati on/Refere nee:在 FR 网络中，当 CIR 超过时会发生什么情况？D :所有超过的流量都丢弃。QUESTION 32What are two characteristics of Frame Relay poin t-to-po int sub in terfaces?(Choose two.)A. They create split-horiz on issues.B. They require a unique sub net with in a rout ing doma in.C. They emulate leased lin es.D. They are ideal for full-mesh topologies.E. They require the use of NBMA optio ns whe n usi ng OSPF.An swer: BCSection: Chapter 14: Wide Area Network (W AN)Expla nati on/Refere nee