思科认证互联网专家CCIE考试(习题卷5)

试卷科目：思科认证互联网专家CCIE考试思科认证互联网专家CCIE考试(习题卷5)PAGE"pagenumber"pagenumber/SECTIONPAGES"numberofpages"numberofpages思科认证互联网专家CCIE考试第1部分：单项选择题，共82题，每题只有一个正确答案,多选或少选均不得分。[单选题]1.Question4Refertotheexhibit.Device#configureterminalDevice(config)#netconfsshacl1Device(config)#netconflock-time100Device(config)#netconfmax-sessions1Device(config)#netconfmax-message10AnetworkengineermustconfigureNETCONF.Aftercreatingtheconfiguration,theEngineergetsoutputfromthecommandshowline,butnotfromshowrunning-config.WhichCommandcompletestheconfiguration?A)Device(config)#nonetconfsshacl1B)Device(config)#netconfmax-sessions100C)Device(config)#netconflock-time500D)Device(config)#netconfmax-message1000答案:A解析:[单选题]2.WhatisonedifferencebetweenSaltstackandAnsible?A)SaltStackusesanAPIproxyagenttoprogramCiscoboxesonagentmode,whereasAnsibleusesaTelnetconnectionB)SaltStackusestheAnsibleagentonthebox,whereasAnsibleusesaTelnetserverontheBoxC)SaltStackisconstructedwithminion,whereasAnsibleisconstructedwithYAMLD)SaltStackusesSSHtointeractwithCiscodevices,whereasAnsibleusesaneventbus答案:C解析:[单选题]3.whichdevicedoesRouter1sendpacketsthataredestinedtohost65?class="fr-ficfr-dibcursor-hover"A)Router2B)Router3C)Router4D)Router5答案:B解析:[单选题]4.WhichdesignprincipleshouldbefollowedinaCiscoSD-AccesswirelessnetworkDeployment?A)TheWLCispartofthefabricoverlayB)TheWLCispartofthefabricunderlayC)TheWLCisconnectedoutsideofthefabricD)Theaccesspointisconnectedoutsideofthefabric答案:C解析:[单选题]5.Whichaddressblockidentifiesalllink-localaddresses?A)FC00::/7B)FC00::/8C)FE80::/10D)FF00::/8答案:C解析:哪个地址块标识所有链接本地地址?CFE80::/10[单选题]6.WhichrequirementforanAnsible-managednodeistrue?A)ItmusthaveanSSHserverrunning.B)ItmustbeaLinuxserveroraCiscodevice.C)Itmustsupportadhoccommands.D)ItmusthaveanAnsibleTowerinstalled.答案:A解析:[单选题]7.ApacketisbeingsentacrossrouterR1tohost4.Towhichdestinationdoestheroutersendthepacket?class="fr-ficfr-dibcursor-hover"A)46viaSerial0/1/0B)54viaSerial0/0/1C)54viaSerial0/0/0D)50viaSerial/0/0/0答案:B解析:[单选题]8.Inatraditional3tiertopology,anengineermustexplicitlyconfigureaswitchastherootbridgeandexcludeitfromanyfurtherelectionprocessforthespanning-treedomain.Whichactionaccomplishesthistask?A)Configurethespanning-treepriorityto32768B)ConfigurerootguardandportfastonallaccessswitchportsC)ConfigureBPDUguardinallswitch-to-switchconnectionsD)Configurethespanning-treepriorityequalto0答案:B解析:[单选题]9.WhichEIGRPfeatureallowstheuseofleakmaps?A)NeighborB)StubC)Offset-listD)Address-family答案:B解析:[单选题]10.WhichvalueisincludedintheinitialTCPSYNmessage?A)asequencenumberB)aTTLnumberC)anacknowledgmentnumberD)asessionID答案:A解析:初始TCPSYN消息中包含哪些值？a.序列号[单选题]11.WhichcomponentoftheCiscoCyberThreatDefensesolutionprovidesuserandflowcontextanalysis?A)CiscoFirepowerandFireSIGHTB)CiscoStealthwatchsystemC)AdvancedMalwareProtectionD)CiscoWebSecurityAppliance答案:B解析:[单选题]12.WhichresourceisabletobesharedamongvirtualmachinesdeployedonthesamephysicalServer?A)VMconfigurationfileB)operatingsystemC)diskD)applications答案:C解析:[单选题]13.WhenaWPA2-PSKWLANisconfiguredinthewirelessLANController,whatistheminimumnumberofcharacters（thatinASCllformat?A)6B)8C)12D)18答案:B解析:[单选题]14.AtwhichlayerdoesCiscoDNACentersupportRESTcontrols?A)EEMappletsorscriptsB)SessionlayerC)YMALoutputfromresponsestoAPIcallsD)NorthboundAPIs答案:D解析:[单选题]15.Duringdeployment,anetworkengineernoticesthatvoicetrafficisnotbeingtaggedcorrectlyasittraversesthenetwork.WhichCOStoDSCPmapmustbemodifiedtoensurethatvoicetrafficistreatedproperly?A)COSof5toDSCP46B)COSof7toDSCP48C)COSof6toDSCP46D)COSof3toDSCPof26答案:A解析:5,46[单选题]16.Howdoclouddeploymentsdifferfromon-premdeployments?A)Clouddeploymentsaremorecustomizablethanon-premisesdeploymentsB)Clouddeploymentsrequirelongerimplementationtimesthanon-premisesdeploymentsC)Clouddeploymentsrequirelessfrequentupgradesthanon-premisesdeploymentsD)Clouddeploymentshavelowerupfrontcoststhanon-premisesdeployments答案:D解析:[单选题]17.Aresponsecodeof404isreceivedwhileusingtheRESTAPIonCiscoDNACentertoPOSTtothisURI:/dna/intent/api/v1/template-programmer/projectWhatdoesthecodemean?A)ThePOST/PUTrequestwasfulfilledandanewresourcewascreated.Informationabouttheresourceisintheresponsebody.B)Therequestwasacceptedforprocessing,buttheprocessingwasnotcompleted.C)Theclientmadearequestforaresourcethatdoesnotexist.D)Theserverhasnotimplementedthefunctionalitythatisneededtofulfilltherequest.答案:C解析:[单选题]18.YouhaveconfiguredarouterwithanOSPFrouterID,butitsIPaddressstillreflectsthephysicalinterface.Whichactioncanyoutaketocorrecttheproblemintheleastdisruptiveway?A)ReloadtheOSPFprocessB)ReloadtherouterC)SavetherouterconfigurationD)Specifyaloopbackaddress答案:D解析:您已经使用OSPF路由器ID配置了一个路由器，但是它的IP地址仍然反映了物理接口。您可以采取哪些措施以最少的中断方式解决问题？d.指定环回地址[单选题]19.WhichmodeallowsaccesspointstobemanagedbyCiscoWirelessLANControllers?A)autonomousB)lightweightC)BridgeD)mobilityexpress答案:B解析:[单选题]20.InaCiscoStackWiseVirtualenvironment,whichplanesarevirtuallycombinedintheCommonlogicalswitch?A)controlandmanagementB)managementanddataC)control,andforwardingD)controlanddata答案:A解析:[单选题]21.Basedonthisinterfaceconfiguration,whatistheexpectedstateofOSPFadjacency?A)2WAY/DROTHERonbothroutersB)notestablishedC)FULLonbothroutersD)FULL/BDRonR1andFULL/BDRonR2答案:B解析:[单选题]22.WhenusingTLSforsyslog,whichconfigurationallowsforsecureandreliabletransportationofmessagestoitsdefaultport?A)logginghostvrfmgmttransporttcpport6514B)logginghostvrfmgmttransportudpport6514C)logginghostvrfmgmttransporttcpport514D)logginghostvrfmgmttransportudpport514答案:A解析:[单选题]23.HowisMSDPusedtointerconnectmultiplePIM-SMdomains?A)MSDPdependsonBGPormultiprotocolBGPforinterdomainoperationB)MSDPallowsarendezvouspointtodynamicallydiscoveractivesourcesoutsideofitsDomainC)MSDPSArequestmessagesareusedtorequestalistofactivesourcesforaspecificgroupD)MSDPmessagesareusedtoadvertiseactivesourcesinadomain答案:C解析:[单选题]24.WhichactionisthevSmartcontrollerresponsibleforinanSD-WANdeployment?A)onboardvEdgenodesintotheSD-WANfabricB)distributesecurityinformationfortunnelestablishmentbetweenvEdgeroutersC)manage,maintain,andgatherconfigurationandstatusfornodeswithintheSD-WANFabricD)gathertelemetrydatafromvEdgerouters答案:B解析:为vEdge路由器之间建立隧道分发安全信息[单选题]25.whichtaskdoyouneedtoperformfirstwhenyouconfigureIPSLAtotroubleshootanetworkConnectivityissue?A)EnabletheICMPechooperationB)SpecifythetestfrequencyC)VerifytheICMPechooperationD)ScheduletheICMPoperation答案:A解析:配置IPSLA以解决网络连接问题时，需要首先执行哪个任务？a.启用ICMP回显操作[单选题]26.whichroutingprotocolisusedonPErouterstoexchangevpnv4routes?A)EIGRPB)MP-BGPC)OSPFD)OSPFV3答案:B解析:[单选题]27.WhichdataisproperlyformattedwithJSON?A){"name":"Peter","age","25","likesJson":true,"characteristics":["small","strong",18]}B){"name":"Peter","age":"25","likesJson":true,"characteristics":["small","strong","18"],}C){"name":Peter,"age":25,"likesJson":true,"characteristics":["small","strong","18"],}D){"name":"Peter""age":"25""likesJson":true"characteristics":["small","strong",18]}答案:A解析:[单选题]28.Apacketisdestinedfor2.Whichstaticroutedoestherouterchoosetoforwardthepacket?A)iproute40B)iproute652C)iproute052D)iproute054答案:C解析:[单选题]29.whichtechnologydoesciscopfrusetocollectpassivemonitoringstatics?A)NBARB)SNMPC)SYSLOGD)NETFLOW答案:D解析:[单选题]30.WhichbenefitisrealizedbyimplementingSSO?A)IPfirst-hopredundancyB)communicationbetweendifferentnodesforclustersetupC)physicallinkredundancyD)minimalnetworkdowntimefollowinganRPswitchover答案:D解析:[单选题]31.Whicheffectoftheterminalmonitorcommandistrue?A)ItputsthedeviceintoglobalconfigurationmodeB)ItconfiguresthedevicetologmessagestotheconsoleC)ItdisplaystheconfigurationofthesyslogserverD)Itconfiguresasyslogserver答案:B解析:终端监视器命令的哪个效果是正确的？b.配置设备将消息记录到控制台[单选题]32.OnanetworkusingDiffServ,whichoptionreferstotheactionsthatappliedtoapacketasitmovesthroughthenetwork?A)SUPPORTFORSOURCESPECIFICMULTICASTB)AMECHANISMTODECREASELEAVELATENCYC)AUTHENTICATIONOFMULTICASTSTREAMSD)BACKWARDCOMPATIBILITYWITHIGMPVERSION1答案:A解析:[单选题]33.WhichJSONsyntaxisvalid?A){?switch?:?name?:?dist1?,?interfaces?:[?gig1?,?gig2?,?gig3?]}B){/?switch/?:{/?name/?:?dist1?,/?interfaces/?:[?gig1?,?gig2?,?gig3?]}}C){?switch?:{?name?:?dist1?,?interfaces?:[?gig1?,?gig2?,?gig3?]}}D){?switch?:(?name?:?dist1?,?interfaces?:[?gig1?,?gig2?,?gig3?])}答案:C解析:[单选题]34.WhichoptiondescribesthecharacteristicsofapublicInfrastructureasaServicecloudservicemodel?A)Itisawayofdeliveringcloud-computinginfrastructure(servers,storage,network,andoperatingsystems)asanon-demandservice.B)Itisacloud-computingplatformthatfacilitatesthecreationofwebapplicationswithouttheneedtomaintainthesupportingsoftwareapplications.C)Itisacloudservicewheretheunderlyinghardwareismanagedbythecloudserviceprovider.D)Itisacloud-computingplatformthatfacilitatesthecreationofwebapplicationswithouttheneedtomaintainthesupportingsoftwareoperatingsystems.答案:A解析:[单选题]35.WhatdoesanorthboundAPIaccomplish?A)programmaticcontrolofabstractednetworkresourcesthroughacentralizedcontrollerB)accesstocontrollednetworkresourcesfromacentralizednodeC)communicationbetweenSDNcontrollersandphysicalswitchesD)controlledaccesstoswitchesfromautomatedsecurityapplications答案:A解析:通过集中控制器对抽象的网络资源进行程序化控制[单选题]36.Ifaswitchportreceivesanewframewhileitisactivelytransmittingapreviousframe,howdoesitprocesstheframes?A)Thenewframeisdeliveredfirst,thepreviousframeisdropped,andaretransmissionrequestissent.B)Thepreviousframeisdelivered,thenewframeisdropped,andaretransmissionrequestissent.C)Thenewframeisplacedinaqueuefortransmissionafterthepreviousframe.D)Thetwoframesareprocessedanddeliveredatthesametime.答案:C解析:[单选题]37.PC1istryingtopingPC3forthefirsttimeandsendsoutanARPtoS1.WhichactionistakenbyS1?class="fr-ficfr-dibcursor-hover"A)ItforwardsitoutG0/3onlB)ItisfloodedouteveryportexceptG0/0C)ItdropstheframeD)ItforwardsitoutinterfaceG0/2only答案:B解析:[单选题]38.WhichfunctiondoesaCiscoSD-Accessextendednodeperform?A)providesfabricextensiontononfabricdevicesthroughremoteregistrationandConfigurationB)performstunnelingbetweenfabricandnonfabricdevicestoroutetrafficoverunknownNetworksC)usedtoextendthefabricconnectingtodownstreamnonfabricenabledLayer2switchesD)inchargeofestablishingLayer3adjacencieswithnonfabricunmanagednode答案:C解析:用于将fabric连接到下游的非fabric启用的二层交换机[单选题]39.WhichmeasureisusedbyanNTPservertoindicateitsclosenesstotheauthoritativetimesource?A)stratumB)hopcountC)timezoneD)latency答案:A解析:[单选题]40.AlocalroutershowsanEBGPneighborintheActivestate.Whichstatementistrueaboutthelocalrouter?A)ThelocalrouterhasactiveprefixintheforwardingtablefiromtheneighboringrouterB)ThelocalrouterhasBGPpassivemodeconfiguredfortheneighboringrouterC)ThelocalrouterisattemptingtoopenaTCPsessionwiththeneighboringrouter.D)ThelocalrouterisreceivingprefixesfromtheneighboringrouterandaddingtheminRIB-IN答案:C解析:[单选题]41.WhatisthesourceMACaddressofaBPDUframethatissentoutofaport?A)THELOWESTMACADDRESSONTHESWITCHB)THEHIGHESTMACADDRESSONTHESWITCHC)THEMACADDRESSOFTHEINDIVIDUALPORTTHATISSENDINGTHEBPDUD)THESAMEASTHEMACADDRESSINTHEBRIDGEID答案:C解析:[单选题]42.whatcommandcanyouenteronaciscoroutersothatitcanbothpollatimeserverandbepolledbyatimeserver?A)NTPSERVERB)NTPBROADCASTCLIENTC)NTPBROADCASTDESTINATIOND)NTPPEER答案:D解析:[单选题]43.whatisthemodifiedEUI-64valuecorrespondingtoMACaddress0032.F4C5.7781asusedinipv6?A)FFFE.0032.F4C5.7781B)C577.81FF.FE00.32F4C)0032.F4C5.7781.FFFED)0032.F4FF.FEC5.7781.答案:D解析:[单选题]44.Whatdescribestheoperationofvirtualmachines?A)VirtualmachinesareresponsibleformanagingandallocatinghosthardwareresourcesB)Inavirtualmachineenvironment,physicalserversmustrunoneoperatingsystematatime.C)Virtualmachinesarethephysicalhardwarethatsupportavirtualenvironment.D)Virtualmachinesareoperatingsysteminstancesthataredecoupledfromserverhardware答案:B解析:[单选题]45.Whicharchitecturalcomponentenablesazero-trustsecuritymodel?A)controlplaneB)dataplaneC)managementplaneD)plug-and-play答案:C解析:管理层[单选题]46.''HTTP/1.1204NoContent''isreturnedwhenthecurl-i-xDELETEcommandisissued.whichsituationhasoccurred?A)TheobjectcouldnotbelocatedattheURLpathB)ThecommandsucceededindeletingtheobjectC)TheobjectwaslocatedatheURL,butitcouldnotbedeletedD)TheURLwasinvalid答案:B解析:[单选题]47.Whichnetworkplaneiscentralizedandmanagesroutingdecisions?A)policyplaneB)managementplaneC)controlplaneD)dataplane答案:C解析:[单选题]48.WhichvaluedoesVPLSusetomakeforwardingdecisions?A)destinationIPaddressofthepacketB)destinationMACoftheEthernetFrameC)sourceIPaddressofthepacketD)sourceMACoftheEthernetframe答案:B解析:[单选题]49.WhatisfactaboutCiscoSD-accesswirelessnetworkinfrastructuredeployments?A)Theaccesspointispartofthefabricoverlay.B)Thewirelessclientispartofthefabricoverlay.C)Theaccesspointispartofthefabricunderlay.D)TheWLCispartofthefabricunderlay.答案:A解析:[单选题]50.TheloginmethodisconfiguredontheVTYlinesofarouterwiththeseparameters..ThefirstmethodforauthenticationisTACACSIfTACACSisunavailable,loginisallowedwithoutanyprovidedcredentialsWhichconfigurationaccomplishesthistask?A)R1#shrun|includeaaaAaanew-modelAaaauthenticationlogindefaultgrouptacacs+noneB)R1#shrun|includeaaaAaanew-modelAaaauthenticationlogindefaultgrouptacacs+noneC)R1#shrun|includeaaaAaanew-modelAaaauthenticationlogindefaultgrouptacacs+Aaasession-idcommonR1#shrun|sectionvtyLinevty04TransportinputnoneR1#D)R1#shrun|includeaaaAaanew-modelAaaauthenticationlogindefaultgrouptacacs+noneAaasession-idcommonR1#shrun|sectionvtyLinevty04Password70205d480809R1#shrun|includeusernameR1#答案:D解析:[单选题]51.IfaVRRPmasterrouterfails,whichrouterisselectedasthenewmasterrouter?A)routerwiththelowestpriorityB)routerwiththehighestpriorityC)routerwiththehighestloopbackaddressD)routerwiththelowestloopbackaddress答案:B解析:[单选题]52.WhatoccurswhenoverlappingWi-Fichannelsareimplemented?A)Thewirelessnetworkbecomesvulnerabletounauthorizedaccess.B)WirelessdevicesareunabletodistinguishbetweendifferentSSIDsC)Usersexperiencepoorwirelessnetworkperformance.D)Networkcommunicationsareopentoeavesdropping.答案:C解析:[单选题]53.WhichRPVST+portstateisexcludedfromallSTPoperations?A)learningB)forwardingC)blockingD)disabled答案:D解析:哪个RPVST+端口状态被排除在所有STP操作之外?D禁用[单选题]54.whichnetworkallowsdevicestocommunicatewithouttheneedtoaccesstheinternet?A)/16B)/16C)/18D)/24答案:B解析:[单选题]55.HowdoAAAoperationscompareregardinguseridentification,userservices,andaccesscontrol?A)Authorizationprovidesaccesscontrol,andauthenticationtracksuserservicesB)Accountingtracksuserservices,andauthenticationprovidesaccesscontrol.C)Authorizationidentifiesusers,andauthenticationprovidesaccesscontrolD)Authenticationidentifiesusers,andaccountingtracksuserservices答案:D解析:[单选题]56.Whenvoiceservicesaredeployedoverawirelessenvironment,whichservicemustbeDisabledtoensurethequalityofcalls?A)AggressiveloadbalancingB)DynamictransmitpowercontrolC)PriorityqueuingD)Fastlane答案:A解析:主动负载均衡[单选题]57.whichfunctionisperformedbythecollapsedcorelayerinatwo-tierarchitecture?A)ApplyingsecuritypoliciesB)AttachinguserstotheedgeofthenetworkC)EnforcingroutingpoliciesD)Makinginterestingtrafficfordatapolicies答案:C解析:[单选题]58.WhichelementenablescommunicationbetweenguestVMswithinavirtualizedenvironment?A)pNICB)vSwitchC)virtualrouterD)hypervisor答案:B解析:[单选题]59.WhatfunctiondoesVXLANperforminanSD-Accessdeployment?A)policyplaneforwardingB)controlplaneforwardingC)dataplaneforwardingD)systemsmanagementandorchestration答案:C解析:VXLAN=dataplaneforwarding[单选题]60.Asystemmustvalidateaccessrightstoallitsresourcesandmustnotrelyonacachedpermissionmatrix.Iftheaccessleveltoagivenresourceisrevokedbutisnotreflectedinthepermissionmatrix,thesecurityisvidlatedWhichtermreferstothisRESTsecuritydesignprinciple?A)leastcommonmechmismB)completemediationC)separationofprivilegeD)economyofmechanism答案:B解析:[单选题]61.WhichoptionisavalidIPv6address?A)2001:0000:130F::099a::12aB)2002:7654:A1AD:61:81AF:CCC1C)FEC0:2927:1860:W067::2A4D)2004:1:25A4:886F::1答案:D解析:哪个选项是有效的IPv6地址?2004:1:25A4:886F::1[单选题]62.WhichLLDPextensionprovidesadditionalsupportforVoIP?A)TLVB)LLDP-MEDC)LLDPv3D)LLDP-VOIP答案:B解析:哪个LLDP扩展为VoIP提供了额外的支持？[单选题]63.WhichencryptionhashingalgorithmdoesNTPuseforauthentication?A)SSLB)MD5C)AES128D)AES256答案:B解析:[单选题]64.whichtechnologycanbeusedtosecuretheedgeofanSTPdomain?A)ROOTGUARDB)BPDUGUARDC)UPLINKFASTD)BPDUFILTER答案:B解析:[单选题]65.Whichfeaturemonitorsnetworkeventsandtakesautomatedactionbasedonscriptsconfiguredbytheadministrator?A)EPCB)EEMC)PERFORMANCEMONITORD)NETFLOW答案:B解析:[单选题]66.InawirelessCiscoSD-Accessdeployment,whichroamingmethodisusedwhenausermovesfromoneaccesspointtoanotheronadifferentaccessswitchusingasingleWLC?A)Layer3B)inter-xTRC)autoanchorD)fastroam答案:B解析:[单选题]67.Whenasite-to-siteVPNisused,whichprotocolisresponsibleforthetransportofuserdata?A)IKEv2B)IKEv1C)IPsecD)MD5答案:C解析:[单选题]68.Whichdevicecontrolstheforwardingofauthenticationrequestsforuserswhenconnectingtothenetworkusingalightweightaccesspoint?A)TACACSserverB)wirelessaccesspointC)RADIUSserverD)wirelessLANcontroller答案:B解析:[单选题]69.whichmetricvectorsarcstoredbutarenotusedbydefaultinEIGRP?A)RELIABILITYANDDELAYB)BANDWIDTHANDDELAYC)LOADANDRELIABILITYD)LOADANDBANDWIDTH答案:C解析:[单选题]70.WhichoutcomeisachievedwiththisPythoncode?Client.connect(ip,port=22,username=usr,password=pswd)Stdin,stdout,stderr=client.exec_command('showipbgpbestpathin')Print(stdout)A)ConnectstoaCiscodeviceusingSSHandexportstheBGPtablefortheprefixB)ConnectstoaCiscodeviceusingSSHandexportstheroutingtableinformationC)DisplaystheoutputoftheshowcommandinaformattedwayD)ConnectstoaCiscodeviceusingTelnetandexportstheroutingtableinformation答案:A解析:[单选题]71.Howis802.11traffichandledinafabric-enabledSSID?A)convertedbytheAPinto802.3andencapsulatedintoaVLANB)centrallyswitchedbacktoWLCwheretheusertrafficismappedtoaVXLANontheWLCC)centrallyswitchedbacktoWLCwheretheusertrafficismappedtoaVLANontheWLCD)convertedbytheAPinto802.3andencapsulatedintoVXLAN答案:D解析:[单选题]72.WhatisthemodifiedEUI-64valuecorrespondingtoMACaddress0032.F4C5.7781asusedinIPv6?A)FFFE.0032.F4C5.7781B)C577.81FF.FE00.32F4C)0032.F4C5.7781.FFFED)0032.F4FF.FEC5.7781.答案:D解析:[单选题]73.AvulnerabilityassessmenthighlightedthatremoteaccesstotheswitchesispermittedUsingunsecureandunencryptedprotocols.WhichconfigurationmustbeappliedtoallowOnlysecureandreliableremoteaccessfordeviceadministration?A)linevty015LoginlocalTransportinputallB)linevty015LoginlocalTransportinputtelnetsshC)linevty015LoginlocalTransportinputnoneD)linevty015LoginlocalTransportinputssh答案:D解析:[单选题]74.whenisitusefilltodisablesplithorizononanEIGRPinterface?A)DISABLEITWHENYOUWANTTOPROVIDEADDITIONALBACKUPPATHSINYOURNETWORK.B)DISABLEITWHENYOUWANTTOSENDROUTESTHATARCLEARNEDFROMANOTHERROUTINGPROTOCOLTOPEEROILTHESAMEINTERFACE.C)DISABLEITWHENYOUNEEDTOSENDUPDATESTOPEERSONTHEINTERFACEONWHICHTHEUPDATESWERERECEIVED.D)ITISNEVERADVISABLETODISABLESPLITHORIZONONANEIGRPINTERFACE.答案:C解析:[单选题]75.WhichoptiondescribeshowarouterrespondsifLSAthrottlingisconfiguredanditreceivestheidenticalLSAbeforetheintervalisset?A)THELSAISADDEDTOTHEOSPFDATABASEANDANOTIFICATIONISSENTTOTHESENDINGROUTERTOSLOWDOWNITSLSAPACKETUPDATES.B)THELSAISADDEDTOTHEOSPFDATABASE.C)THELSAISIGNORED.D)THELSAISIGNOREDANDANOTIFICATIONISSENTTOTHESENDINGROUTERTOSLOWDOWNITSLSAPACKETUPDATES答案:C解析:[单选题]76.AfteraredundantrouteprocessorfailureoccursonaLayer3device,whichmechanismallowsforpacketstobeforwardedfromaneighboringrouterbasedonthemostrecenttables?A)RPVST+B)RPfailoverC)BFDD)NSF答案:D解析:[单选题]77.HowcanyoureducelatencyonaVoIPnetwork?A)IMPLEMENTLOW-LATENCYQUEUING.B)IMPLEMENTFASTRETRANSMISSION.C)IMPLEMENTACONGESTION-AVOIDANCEALGORITHM.D)SETTHEIPSLATIMEOUTTO1000MILLISECONDS.E)CONFIGUREAILSLATOCOLLECTINFORMATIONONPACKETSLOSS.答案:A解析:[单选题]78.refertotheexhibit.Whichstatementistrue?A)THECISCOPFRSTATEISUP;HOWEVER,THEEXTERNALINTERFACEET0/1OFBORDERROUTERHASEXCEEDEDTHEMAXIMUMAVAILABLEBANDWIDTHTHRESHOLD.B)THECISCOPFRSTATEISUP;HOWEVER,ANISSUEISPREVENTINGTHEBORDERROUTERFROMESTABLISHINGATCPSESSIONTOTHEMASTERCONTROLLER.C)THECISCOPFRSTATEISUPANDISABLETOMONITORTRAFFICFLOWS;HOWEVER,MD5AUTHENTICATIONHASNOTBEENSUCCESSFULBETWEENTHEMASTERCONTROLLERANDTHEBORDERROUTERS.D)THECISCOPFRSTATEISUP;HOWEVER,THERECEIVECAPACITYWASNOTCONFIGUREDFORINBOUNDTRAFFIC.E)THECISCOPFRSTATEISUP,ANDTHELINKUTILIZATIONOUT-OF-POLICYTHRESHOLDISSETTO90PERCENTFORTRAFFICEXITINGTHEEXTERNALLINKS.答案:E解析:[单选题]79.whichtrunkingconfigurationbetweentwociscoswitchescancauseasecurityrisk?A)CONFIGURINGDIFFERENTNATIVEVLANSONTHESWITCHESB)CONFIGURINGDIFFERENTTRUNKMODESONTHESWITCHESC)CONFIGURINGMISMATCHEDVLANSONTHETRUNKD)DISABLINGDTPONTHETRUNKPORTSE)CONFIGURINGINCORRECTCHANNEL-GROUPSONTHESWITCHES答案:A解析:[单选题]80.ifEIGRPandOSPFarcconfiguredwithinailadministrativedomainforthesamenetwork,whichvaluecanyouchangesothattheOSPFbecomestheinstalledroutingprotocolforallroutes?A)LOCALPREFERENCEB)METRICC)MEDD)ADMINISTRATIVEDISTANCEE)PREFIXLENGTH答案:D解析:[单选题]81.WhichPPPsubprotocolnegotiatesauthenticationoptions?A)NCPB)LCPC)ISDND)DLCIE)SLIP答案:B解析:哪个PPP子协议协商认证选项?BLCP[单选题]82.whichcommandcanyouenteronauinterfacesothattheinterfacewillnotifythesenderofapacketthatthepacketthatthepathissub-optimal?A)IPNHRPRECORDB)IPNHRPSET-UNIQUE-BITC)IPNHRPSHORTCUTD)IPNHRPREDIRECTE)IPNHRPCOST65535答案:D解析:第2部分：多项选择题，共18题，每题至少两个正确答案,多选或少选均不得分。[多选题]83.AcustomerhascompletedtheinstallationofaWi-Fi6greenfielddeploymentattheirnewcampus.TheywanttoleverageWi-Fi6enhancedspeedsonthetrustedemployeeWLAN.ToconfiguretheemployeeWLAN,whichtwoLayer2securitypoliciesshouldbeused?(Choosetwo)A)WPA(AES)B)WPA2(AES)+WEPC)802.1XD)OPEN答案:CD解析:[多选题]84.AnengineerisdescribingQoStoaclient.Whichtwofactsapplytotrafficpolicing?(Choosetwo.)A)Policingadaptstonetworkcongestionbyqueuingexcesstraffic.B)Policingshouldbeperformedasclosetothedestinationaspossible.C)Policingdropstrafficthatexceedsthedefinedrate.D)Policingtypicallydelaysthetraffic,ratherthandropsit.E)Policingshouldbeperformedasclosetothesourceaspossible.答案:CE解析:[多选题]85.whichtwostatementsaboutasymmetricroutingaretrue?(choosetwo)A)ITCANCAUSEPACKETLOSSOVERSTATEFULICMPANDUDPCONNECTIONS.B)ITCANCAUSEPACKETLOSSWHENASTATEFULFIREWALLISINUSE.C)ITCANCAUSETCPCONNECTIONSTOCLOSE.D)ITCANCAUSEPACKETLOSSWHENNATISINUSE.E)ITISUNCOMMONINLARGENETWORKS.答案:BD解析:[多选题]86.AnengineerisaskedtoprotectunusedportsthatareconfiguredinthedefaultVLANonaswitch.Whichtwostepswillfulfilltherequest?(Choosetwo)A)ConfiguretheportsinanEtherChannel.B)AdministrativelyshutdowntheportsC)ConfiguretheporttypeasaccessandplaceinVLAN99D)ConfiguretheportsastrunkportsE)EnabletheCiscoDiscoveryProtocol答案:BC解析:[多选题]87.Whichtwostatementsaboutaflatsingle-hubDMVPNwithNHRParetrue?(Choosetwo)A)NHRPDISABLESMULTICAST.B)THEHUBROUTERUSESNHRPTOINITIATETHEGRETUNNELWITHSPOKES.C)NHRPSHORTENSTHECONFIGURATIONOFTHEHUBROUTER.D)NHRPDYNAMICALLYPROVIDESINFORMATIONABOUTTHESPOKEROUTERSTOTHEHUB.E)THESPOKEROUTERSACTASTHENHRPSERVERS.答案:CD解析:[多选题]88.Refertotheexhibit.WhichtwocommandsensurethatDSW1becomesrootbridgeforVLAN10and20?(Choosetwo)A)Spanning-treemstpvlan10,20rootprimaryB)Spanning-treemstvlan10,20priorityrootC)Spanning-treemst1rootprimaryD)Spanning-treemst1priority4096E)Spanning-treemst1priority1答案:CD解析:[多选题]89.TheSW1interfaceg0/1isinthedown/downstate.Whichtwoconfigurationsarevalidreasonsfortheinterfaceconditions?(choosetwo)A)ThereisaduplexmismatchB)ThereisaspeedmismatchC)ThereisaprotocolmismatchD)TheinterfaceisshutdownE)Theinterfaceiserror-disabled答案:BE解析:[多选题]90.youarebackingupaserverwitha1gbpslinkandalatencyofa2ms.Whichtwostatementsaboutthearetrue?(choosetwo)A)THEBANDWIDTHDELAYPRODUCTIS2MB.B)THEDEFAULTTCPSENDWINDOWSIZEISTHELIMITINGFACTORC)THEDEFAULTTCPRECEIVEWINDOWSIZEISTHELIMITINGFACTORD)THEBANDWIDTHDELAYPRODUCTIS500MB.E)THEBANDWIDTHDELAYPRODUCTIS500MB.答案:AC解析:[多选题]91.Refertotheexhibit.Whichtwostatementsaboutthedeviceconfigurationarctrue?(Choosetwo)A)THEDEVICEHASCONTROL-PLANEPROTECTIONENABLED.B)THEDEVICEIMPLICITLYALLOWSTELNETCONNECTIONSC)THEGIGABITETHERNET0/1INTERFACEOFTHEDEVICEALLOWSINCOMINGSSHANDSNMPCONNECTIONS.D)THEDEVICEHASMANAGEMENT-PLANEPROTECTIONENABLED.E)THEDEVICEALLOWSSSHCONNECTIONSTOITSLOOPBACKINTERFACE.答案:CD解析:[多选题]92.whataretwoadvantagesofstaticrouting?(choosetwo)A)ItcanbeiimplementedeasilyeveninlargeenvironmentsB)ItproducesminimalCPU