CISCOCCNA网络工程师题库.pdf
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1、培训大讲堂官方YY频道:3 660 mC C N A题库考试代号:64 0-8 0 2考试时间:英文1 1 0+3 0=1 4 0分钟通过分数:8 2 5题库版本:V 1 0 4.4鸿鹄论坛招募C C N A、C C N P答疑讲师答疑地点:鸿鹄官方Y Y频道3 660C C N A (64 0-8 0 2)题库 V 1 0 4.4C C N A (64 0-8 0 2)题库 V 1 0 4.4 (情人节版)V 1 0 4系列是官方的终结版本,以后不会再出V 1 0 5 V 1 0 6 V 1 0 8等等更新内容:V 1 0 4.1修正V 1 0 4中错误题目,确定经典争议题目答案;V 1 0
2、 4.2增加拖图题并可完美模拟考试,V C E题库增加中文注释;V 1 0 4.3针对思科C C N A考试变题,更新考试新增题目9 3 Q,更新V 1 0 4.2实验题;V 1 0 4.4增加全文中文注释,汇总V 1 0 4.3九次更新,删除部分旧题目,为目前最新官方正版题库;2 0 1 1.8.1增加每日新题,修订部分错误。增加5道新题,分别是5 1 9、5 2 0、5 2 1、5 2 2、5 2 3题修改1 7 6题、3 7 5题、4 4 3题、4 8 2题答案错误修改5 9题、8 8题、4 5 3题、1 0 7题、2 7 0题注释错误增加个别疑难拖图题注释,优化实验题Q U E S T
3、 I O N 1W h e n y o u a r e l o g g e d i n to a sw i tc h,w h i c h p r o m p t i n d i c a te s th a t y o u a r e i np r i v i l e g e d m o d e?(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.#A n sw e r:ES e c ti o n:C h a p te r 4:I n tr o d uc ti o n to C i sc o I O SE x p l a n a ti o n/R e f e r e n c
4、e:特权模式就是#提示符Q U E S T I O N 2W h i c h c o m m a n d sh o w s sy ste m h a r d w a r e a n d so f tw a r e v e r si o n i n f o r m a ti o n?(哪些命令显示系统硬件和软件的版本信息?)A.show c onfigurationB.show environmentC.show inventoryD.show platformE.show versionAnswer:ESec tion:Chapter 4:Introduc tion to Cisc o IOS
5、Explanation/Referenc e:查看系统的软件和硬件信息使用的命令是show versionQUEST ION 3Cisc o Catalyst switc hes CAT 1 and CAT 2 have a c onnec tion between them usingports F AO/13.An 802.IQ trunk is c onfigured between the two switc hes.OnCAT 1,VLAN 10 is c hosen as native,but on CAT 2 the native VLAN is notspec ified.Wh
6、at will happen in this sc enario?(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.IQ giants frames c ould saturate the link.B.VLAN 10 on CAT 1 and VLAN 1 on CAT 2 will send untagged frames.C.A native VLAN mismatc h error messa
7、ge will appear.D.VLAN 10 on CAT 1 and VLAN 1 on CAT 2 will send tagged frames.Answer:CSec tion:Chapter 10:VLANExplanation/Referenc e:如果两边native不匹配的话.switc h将报native不匹配的日志信息QUEST ION 4Whic h c ommand would c orrec tly c onfigure a serial port on a router with thelast usable host address in the(/2 9 子
8、网的路由器上配置的串行端口?)Answer:FSec tion:Chapter 4:Introduc tion to Cisc o IOSExplanation/Referenc e:QUEST ION 5valid IP address of this host?()Answer:CSec tion:Chapter 3:IP Addressing and VLSMExplanation/Referenc e:考点:考查VLSMA:超出范围B:广播地址C:正确D:网络号E:超出范围QUEST ION 6Whic h two addresses c an be assigned)Answer:B
9、DSec tion:Chapter 3:IP Addressing and VLSMExplanation/Referenc e:考点:考查VLSMA:网络号B/D:正确C:广播地址E:网络号QUEST ION 7T he network administrator has asked you to c hec k the status of theworkstations IP stac k by pinging the loopbac k address.Whic h address wouldyou ping to perform this task?网络管理员已要求您通过ping环回地
10、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?Answer:BSec tion:Chapter 3:IP Addressing and VLSMExplanation/Referenc e:考点:使用ping来检测主机的IP栈。QUEST ION 8ping between the hosts are unsuc c essful.What two things c an be done toallow c ommunic ations between the hosts?(Choose two.)()A.Replac e the straight-through c ab
11、le with a c rossover c able.B.Change the subnet mask of the hosts to/25.C.Change the subnet mask of the hosts to/26.Answer:ABSec tion:Chapter 3:IP Addressing and VLSMExplanation/Referenc e: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。QUEST
12、 ION 9unable to ping any remote devic es.What is preventing the router frompinging remote devic es?()A.T he default gateway is not an address on this subnet.B.T he default gateway is the broadc ast address for this subnet.C.T he IP address is the broadc ast address for this subnet.D.T he I P address
13、 is an invalid class D multicast address.A nswer:BS ection:C hapter 3:I P A ddressing and V L S ME xplanation/R eference:考点:考查V L S M。A: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。Q U E S T I O N 1 0W hich command is used to copy the configuration from R A M into N V R A M?哪个命令用
14、于从R A M复制到N V R A M的配置A.copy running-config startup-configB.copy startup-config:running-config:C.copy running config startup configD.copy startup config running configE.write terminalA nswer:AS ection:C hapter 4:I ntroduction to C isco I O SE xplanation/R eference:Q U E S T I O N 1 1W hich command i
15、s used to load a configuration from a T F T P server and mergethe configuration into R A M?(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 running-config:T F T P:B.copy T F T P:running-configC.copy T F T P:startup-configD.copy startup-config:T F T P:A nswer:BS ection:C hapter 4:I ntroduction to C isco I O SE
16、xplanation/R eference:Q U E S T I O N 1 2A system administrator types the command to change the hostname of a router.W here on the C isco I F S is that change stored?A.N V R A MB.R A MC.F L A S HD.R O ME.P C M C I AA nswer:BS ection:C hapter 4:I ntroduction to C isco I O SE xplanation/R eference:run
17、ning-c onfig 保存在 RAM 中startup-c onfig 保存在 NVRAM 中QUEST ION 13Whic h c ommand is used to c onfigure a default route?Answer:DSec tion:Chapter 6:IP RoutingExplanation/Referenc e:QUEST ION 14If IP routing is enabled,whic h two c ommands set the gateway of last resortto the default gateway?(如果启用了 I P路由,哪
18、两个命令设置网关的最后到默认网关?)(Choose two.)Answer:CESec tion:Chapter 6:IP RoutingExplanation/Referenc e:产生默认网关的两种方式ip default-networkip routeQUEST ION 15Whic h c ommand would you c onfigure globally on a Cisc o router that wouldallow you to view direc tly c onnec ted Cisc o devic es?(该命令将全局上配置使您可以直接查看的Cisco路由器连
19、接Cisco设备吗?)A.enable c dpB.c dp enableC.c dp runD.run c dpAnswer:CSec tion:Chapter 5:Managing Cisc o IOSExplanation/Referenc e:QUEST ION 16Whic h c ommand is used to see the path taken by pac kets ac ross 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.trac erouteD.trac e ip rou
20、teAnswer:CSec tion:Chapter 2:T CP/IPExplanat ion/Referenc e: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QUEST ION 17Whic h c ommand is used to debug a ping c ommand?哪些命令用于调试ping命令?A.debug ic mpB.debug ip ic mpC.debug tc pD.debug pac ketAnswer:BSec tion:Chapter 5:Managing Cisc o IOSExplanation/Refer
21、enc e:ping调用了 ic mp协议,而 ic mp数据包封装在ip包中。QUEST ION 18Whic h c ommand displays CPU utilization?哪个命令显示的C PU 利用率呢?A.show protoc olsB.show proc essC.show systemD.show versionAnswer:BSec tion:Chapter 5:Managing Cisc o IOSExplanation/Referenc e:查看CPU利用率。QUEST ION 19When c onfiguring a serial interfac e on
22、a router,what is the defaultenc apsulation?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.pppAnswer:CSec tion:Chapter 14:Wide Area Network(WAN)Explanation/Referenc e:缺省封装是HDLCQUEST ION 20What must be set c orrec tly when c onfiguring a serial interfac e so thathigher-level protoc ols c
23、alc ulate 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.bandwidthB.delayC.loadD.reliabilityAnswer:ASec tion:Chapter 6:IP RoutingExplanation/Referenc e: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。QUEST ION 21A c ompany implements video c onferenc ing over IP on their Ethernet LAN.T heusers not
24、ic e that the network slows down,and the video either stuttersor fails c ompletely.What is the most likely reason for this?公司对他们的以太网LAN ip 实现视频会议。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.minimum c ell rate(MCR)B.quality of servic e(QoS)C.modulationD.pac ket switc hing exc hange(PSE)E.reliable transport pr
25、otoc ol(RT P)Answer:BSec tion:Chapter 9:Switc hingExplanation/Referenc e: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。QUEST ION 22Whic h layer in the OSI referenc e model is responsible for determining theavailability of the rec eiving program and c hec king to see if enough resourc esexist for
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