新版CCNA题库640802例题分析完整版V13四.docx
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新版CCNA题库640802例题分析完整版V13四.docx
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新版CCNA题库640802例题分析完整版V13四
新版CCNA802v13题库分析(四)
169.Refertotheexhibit.ThenetworkadministratorisinacampusbuildingdistantfromBuildingB.WANRouterishostinganewlyinstalledWANlinkoninterfaceS0/0.ThenewlinkisnotfunctioningandtheadministratorneedstodetermineifthecorrectcablehasbeenattachedtotheS0/0interface.HowcantheadministratoraccuratelyverifythecorrectcabletypeonS0/0inthemostefficientmanner?
A.TelnettoWANRouterandexecutethecommandshowinterfacesS0/0
B.TelnettoWANRouterandexecutethecommandshowprocessesS0/0
C.TelnettoWANRouterandexecutethecommandshowrunning-configuration
D.TelnettoWANRouterandexecutethecommandshowcontrollerS0/0
E.PhysicallyexaminethecablebetweenWANRouterS0/0andtheDCE.
F.EstablishaconsolesessiononWANRouterandexecutethecommandshowinterfacesS0/0
Answer:
D要检验端口s0/0的线缆类型,首先要登陆到路由器上去,我们可以通过telnet的技术登上去,查看接口所接的线缆的类型使用的命令为showcontrollers0/0,可以看到接口的状态为DTE,或是DCE。
170.WhichencryptiontypedoesWPA2use?
A.AES-CCMPB.PPKviaIVC.PSKD.TKIP/MIC
Answer:
A
171.Refertotheexhibit.Atechnicianistroubleshootingahostconnectivityproblem.ThehostisunabletopingaserverconnectedtoSwitch_A.Basedontheresultsofthetesting,whatcouldbetheproblem?
A.Aremotephysicallayerproblemexists.B.ThehostNICisnotfunctioning.
C.TCP/IPhasnotbeencorrectlyinstalledonthehost.D.Alocalphysicallayerproblemexists.
Answer:
D主机ping自己能够ping通自己,但是包无法发送出去,表明自己的物理层有问题存在。
而因为能够ping通自己,表明TCP/IP的协议栈运行是良好的。
172.Aroutingprotocolisrequiredthatsupports:
1)routingupdateauthentication
2)anaddressingschemethatconservesIPaddresses
3)multiplevendors
4)anetworkwithover50routers
Whichroutingprotocolfulfillstheserequirements?
A.RIPv1B.RIPv2C.EIGRPD.OSPF
Answer:
D首先RIPv1是不支持认证的,因此答案A我们可以排除。
是支持多厂商的,因此是一个开放的标准的协议,可以排除EIGPR,因为这是个CISCO私有的协议。
网络的大小可以超过50台路由器,那RIPv2就不满足了,因为RIP最大支持16跳。
那么答案就是OSPF了。
173.Refertotheexhibit.WhatisthecorrectaddressingforaframeandpacketreceivedbyHostBfromHostA?
A.DestinationMAC:
0011.43da.2c98
SourceMAC:
0070.0e8f.088a
DestinationIP:
192.168.60.5
SourceIP:
192.168.24.5
B.DestinationMAC:
0011.43da.2c98
SourceMAC:
00b0.d0ef.5f6a
DestinationIP:
192.168.60.5
SourceIP:
192.168.24.5
C.DestinationMAC:
0011.43da.2c98
SourceMAC:
0070.0e8f.088a
DestinationIP:
192.168.60.5
SourceIP:
192.168.60.1
D.DestinationMAC:
0011.43da.2c98
SourceMAC:
0070.0e97.af4e
DestinationIP:
192.168.60.5
SourceIP:
192.168.60.2
Answer:
A我们来看一下包发送的过程:
HostA发送的:
sourceip:
192.168.24.5,destinationip:
192.168.60.5Sourcemac:
00b0.doef.5f6a,destinationmac:
0007.0e56.ab2eSwitch1收到后经过查找mactable,不做任何修改发往Router1Router1发送的:
sourceip192.168.24.5destinationip:
192.168.60.5Sourcemac:
0007.0e8f.088a,destinationmac:
0011.43da.2c98
174.Refertotheexhibit.ThenetworkadministratorhasverifiedthatafunctioningcableconnectsSwitch1andSwitch2.Fromtheoutputthatisshown,whattwopiecesofinformationcantheadministratorvalidlyconclude?
(Choosetwo.)
A.UsingasourceMACaddressof0009.11f3.8848,Switch2issendingframestoSwitch1.
B.Interfacefa0/1onSwitch1isinashutdownstate.
C.Thestatusoffa0/2shouldbecheckedonSwitch2.
D.ThereislikelytobeanIPaddressissueonSwitch1fa0/1.
E.TheinterfaceisfunctionalatOSILayer1.
Answer:
CE接口显示的notconnect,当然需要检查对端的接口的状态了,一般来说交换机的接口显示为一up一down,是物理链路出现了问题。
因为他只有物理层是up的,所以我们只能说他工作在OSI的第一层。
175.WhichwirelessLANdesignensuresthatamobilewirelessclientwillnotloseconnectivitywhenmovingfromoneaccesspointtoanother?
A.usingadaptersandaccesspointsmanufacturedbythesamecompany
B.overlappingthewirelesscellcoveragebyatleast10%
C.configuringallaccesspointstousethesamechannel
D.utilizingMACaddressfilteringtoallowtheclientMACaddresstoauthenticatewiththesurroundingAPs
Answer:
B
176.Refertotheexhibit.TwobuildingsontheSanJosecampusofasmallcompanymustbeconnectedtouseEthernetwithabandwidthofatleast100Mbps.Thecompanyisconcernedaboutpossibleproblemsfromvoltagepotentialdifferencesbetweenthetwobuildings.Whichmediatypeshouldbeusedfortheconnection?
A.UTPcableB.STPcableC.coaxialcableD.fiberopticcable
Answer:
D电压不同,而且两个公司的距离不是很远,当然可以考虑光纤了。
177.AnetworkadministratorisconfiguringtheroutersinthegraphicforOSPF.TheOSPFprocesshasbeenstartedandthenetworkshavebeenconfiguredforArea0asshowninthediagram.ThenetworkadministratorhasseveraloptionsforconfiguringRouterBtoensurethatitwillbepreferredasthedesignatedrouter(DR)forthe172.16.1.0/24LANsegment.Whatconfigurationtaskscouldbeusedtoestablishthispreference?
(Choosethree.)
A.ConfigurethepriorityvalueoftheFa0/0interfaceofRouterBtoahighervaluethananyotherinterfaceontheEthernetnetwork.
B.ChangetherouteridofRouterBbyassigningtheIPaddress172.16.1.130/24totheFa0/0interfaceofRouterB.
C.ConfigurealoopbackinterfaceonRouterBwithanIPaddresshigherthananyIPaddressontheotherrouters.
D.ChangethepriorityvalueoftheFa0/0interfaceofRouterBtozero.
E.ChangethepriorityvaluesoftheFa0/0interfacesofRouterAandRouterCtozero.
F.Nofurtherconfigurationisnecessary.
Answer:
ACEOSPF中的共享介质下是需要选举DR和BDR的,而这个选举的过程是通过比较优先级和RID来实现的。
优先级越高的越优先选举成为DR,优先级为0的接口是不参加DR的选举的,如果优先级相同就比较他们的RID,RID越大的越优先。
RID的选举过程是:
手工指定的最为优先,如果没有手工指定RID,则比较路由器上活动接口的IP地址,如果有回环口就选用回环口IP地址最大的地址作为RID,如果没有回环口,就选用物理接口地址中最大的IP地址为RID这个题中需要确保RouterB成为网络172.16.1.0/24的DR,根据上面的解释可以看出,让他成为DR的方式有:
改RouterB的f0/0的优先级为最大的;改172.16.1.0/24网段上的其他接口的优先级为0;设置RouterB的RID最大。
178Refertotheoutputofthetwoshowcommandsintheexhibit.Ifanadministratortriestopinghost10.1.8.5fromhost10.1.6.100,howwilltheICMPpacketsbeprocessedbyRouterA?
A.Thepacketswillbediscarded.B.ThepacketswillberoutedouttheS0/0interface.
C.ThepacketswillberoutedouttheS0/1interface.
D.ThepacketswillberoutedouttheFa0/0interface.
Answer:
C可以看到10.1.8.5的网段不在路由表中,但是在RouterA的路由表中有一条RIP的缺省路由,因此可以收到的ICMP的报文是从s0/1来的。
179.Refertotheexhibit.TheBranchrouterdisplaysknowledgeofaroutetonetwork172.16.0.0/16.Theactualnetworknumberatheadquartersis172.16.1.0/24.Whydoesthenetworknumberappearasitdoesintheroutingtable?
A.TheBranchrouterhasastaticrouteconfiguredforthe172.16.0.0/16network.
B.TheroutingprotocolontheHQrouterisusingautomaticroutesummarization.
C.TheBranchrouterisconfiguredtosummarizetoclassfulboundaries.
D.TheroutingprotocolontheBranchrouterhasbeenmisconfigured.
E.Theroutingprotocolthatisforwardingthisrouteonlysendsclassfulupdates.
Answer:
B
180.IPaddressesandroutingforthenetworkareconfiguredasshownintheexhibit.ThenetworkadministratorissuestheshowipeigrpneighborscommandfromRouter1andreceivestheoutputshownbelowthetopology.Whichstatementistrue?
A.ItisnormalforRouter1toshowoneactiveneighboratatimetopreventroutingloops.
B.RoutingisnotcompletelyconfiguredonRouter3.
C.TheIPaddressesarenotconfiguredproperlyontheRouter1andRouter3interfaces.
D.Thenoauto-summarycommandconfiguredontherouterspreventsRouter1andRouter2fromforminganeighborrelationship.
Answer:
B在R3上只公告了192.168.2.0和10.0.0.0的网段,也只激活了接口S1和10.0.4.0的接口,而接口s0没有激活,因此R3与R1之间是无法建立邻居的。
虽然R1会向R3的S0口发EIGRP的Hello包,但是R3是无法回复的。
所以在R1上看到的EIGRP的邻居只有192.168.1.2。
181.Refertotheexhibit.WhyisflashmemoryerasedpriortoupgradingtheIOSimagefromtheTFTPserver?
A.TheroutercannotverifythattheCiscoIOSimagecurrentlyinflashisvalid.
B.FlashmemoryonCiscorouterscancontainonlyasingleIOSimage.
C.Erasingcurrentflashcontentisrequestedduringthecopydialog.
D.Inorderfortheroutertousethenewimageasthedefault,itmustbetheonlyIOSimageinflash.
Answer:
C
182.Refertotheexhibit.Whichtwostatementsaretruebasedtheoutputoftheshowframe-relaylmicommandissuedontheBranchrouter?
(Choosetwo.)
A.LMImessagesarebeingsentonDLCI0.
B.LMImessagesarebeingsentonDLCI1023.
C.InterfaceSerial0/0isnotconfiguredtoencapsulateFrameRelay.
D.TheFrameRelayswitchisnotrespondingtoLMIrequestsfromtherouter.
E.TheLMIexchangebetweentherouterandFrameRelayswitchisfunctioningproperly.
F.TherouterisprovidingaclocksignalonSerial0/0onthecircuittotheFrameRelayswitch.
Answer:
AD
183.Hotspot
Answer:
184.LAB
Answer:
Router>en
Router#configterminal
Router(config)#hostnameWeaver
Router(config)#ipnatpoolnametest198.18.184.105198.18.184.110netmask255.255.255.248
Router(config)#ipnatinsidesourcelist1pooltest
Router(config)#access-list1permit192.168.100.160.0.0.15
Router(config)#ints0/0
Router(config-if)#ipnatoutside
Router(config-if)#exit
Router(config-if)#intfa0/0
Router(config-if)#ipnatinside
185.Refertotheexhibit.Thepartialframeshownintheexhibitdisplaysselectheaderinformationasitarrivesatthedestinationhost.Whichgraphicrepresentsthecorrectheaderinformationintherespondingframereturnedtotheremotehost?
Answer:
D
186.Adentalfirmisredesigningthenetworkthatconnectsitsthreelocations.Theadministratorgavethenetworkingteam192.168.164.0touseforaddressingtheentirenetwok.Aftersubnettingtheaddress,theteamisreadytoassigntheaddresses.Theadministratorplanstoconfigureipsubnet-zeroanduseRIPv2astheroutingprotocol.Asamemberofthenetworkingteam,you
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