思科认证互联网专家CCIE考试(习题卷1)

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1)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222题，每题只有一个正确答案,多选或少选均不得分。[单选题]1.WhichencryptionhashingalgorithmdoesNTPuseforauthentication?A)SSLB)AES256C)AES128D)MD5答案:D解析:[单选题]2.AnadministratormustenableTelnetaccesstoRouterXusingtherouterusernameandPassworddatabaseforauthentication.Whichconfigurationshouldbeapplied?A)RouterX(config)#aaanew-modelRouterX(config)#aaaauthenticationloginauth-listlocalB)RouterX(config)#linevty04RouterX(config-line)#loginRouterX(config-line#endC)RouterX(config)#lineaux0RouterX(config-line)#passwordciscoRouterX(config-line#loginD)RouterX(config)#linevty04RouterX(config-line)#loginlocalRouterX(config-line#end答案:D解析:[单选题]3.Inatraditional3tiertopology,anengineermustexplicitlyconfigureaswitchastherootbridgeandexcludeitfromanyfurtherelectionprocessforthespanning-treedomain.Whichactionaccomplishesthistask?A)Configurethespanning-treepriorityto32768B)ConfigurerootguardandportfastonallaccessswitchportsC)ConfigureBPDUguardinallswitch-to-switchconnectionsD)Configurethespanning-treepriorityequalto0答案:B解析:[单选题]4.WhichprotocoldoesRESTAPIrelyontosecurethecommunicationchannel?A)HTTPB)SSHC)HTTPSD)TCP答案:C解析:[单选题]5.WhichkeyboardshortcutcanyouusetoexittheSystemConfigurationDialogonaCisconetworkingdeviceandreturntoprivilegedEXECmodewithoutmakingchanges?A)Ctrl+Alt+DeleteB)Shift-EscC)Ctrl-CD)Ctrl-v答案:C解析:您可以使用哪个键盘快捷键退出Cisco网络设备上的系统配置对话框并返回到特权执行模式而不进行更改？[单选题]6.IfthemaximumpowerlevelassignmentforglobalTPC802.11a/n/acisconfiguredto10DBm,whichpowerleveleffectivelydoublesthetransmitpower?A)13dBmB)14dBmC)17dBmD)20dBm答案:A解析:[单选题]7.WhichIPv6first-hopsecurityfeatureblockstrafficsourcedfromIPv6addressesthatarcoutsidetheprefixgleanedfromrouteradvertisements?A)IPV6RAGUARDB)IPV6DHCPGUARDC)IPV6SOURCEGUARDD)IPV6PREFIXGUARD答案:D解析:[单选题]8.InOSPF,whichLSAtypeisresponsibleforpointingtotheASBRrouter?A)type1B)type2C)type3D)type4答案:D解析:[单选题]9.WhichWANtopologyprovidesacombinationofsimplicityquality,andavailability?A)PartialmeshB)FullmeshC)Point-to-pointD)Hub-and-spoke答案:C解析:[单选题]10.WhichDNSlookupdoesanaccesspointperformwhenattemptingCAPWAPdiscovery?A)CISCO-DNA-CONTROILLER.localB)CAPWAP-CONTROLLER.localC)CISCO-CONTROLLER.localD)CISCO-CAPWAP-CONTROLLER.local答案:D解析:[单选题]11.WhichcomponentoftheCiscoCyberThreatDefensesolutionprovidesuserandflowcontextanalysis?A)CiscoFirepowerandFireSIGHTB)CiscoStealthwatchsystemC)AdvancedMalwareProtectionD)CiscoWebSecurityAppliance答案:B解析:[单选题]12.WhentheactiverouterinanHSRPgroupfails,whatrouterassumestheroleandforwardspackets?A)forwardingB)backupC)standbyD)listening答案:C解析:[单选题]13.WhathappenstothesignalstrengthofanRFsignalduetowavespreading?A)ThesignalstrengthoftheRFsignalwillfalloffequallynearthetransmitterandalsofartherawayB)ThesignalstrengthoftheRFsignalwillfalloffquicklynearthetransmitterbutmoreslowlyfartherawayC)ThesignalstrengthoftheRFsignalwillfalloffslowlynearthereceiverandmorequicklyfartherawayD)ThesignalstrengthoftheRFsignalwillfalloffslowlynearthetransmitterbutmorequicklyfartheraway答案:B解析:[单选题]14.WhichencryptionhashingalgorithmdoesNTPuseforauthentication?A)SSLB)MD5C)AES128D)AES256答案:B解析:[单选题]15.WhichdesignprincipleshouldbefollowedinaCiscoSD-Accesswirelessnetworkdeployment?A)TheWLCisconnectedoutsideofthefabricB)TheWLCispartofthefabricunderlayC)Theaccesspointisconnectedoutsideofthefabric.D)TheWLCispartofthefabricoverlay.答案:A解析:[单选题]16.AnAPiscurrentlytransmittingat50mW.WhatisthevaluewhenconvertedtodBm.A)14dBmB)17dBmC)23dBmD)20dBm答案:B解析:[单选题]17.whichcommandcanyouenteronaCiscoIOSdevicetoenableascheduledalgorithmthatdirectslookupcallstomultipleDNShosts?A)ipdomainround-robinB)ipname-server45C)ipdomainlookupD)ipdomainlist答案:B解析:您可以在CiscoIOS设备上输入哪个命令来启用将查找调用定向到多个DNS主机的计划算法？[单选题]18.whichipv6migrationmethodreliesondynamictunnelsthatusethe2002::/16reservedaddressspace?A)6RDB)6TO4C)ISATAPD)GRE答案:B解析:[单选题]19.WhichresourceisabletobesharedamongvirtualmachinesdeployedonthesamephysicalServer?A)VMconfigurationfileB)operatingsystemC)diskD)applications答案:C解析:[单选题]20.InanMPLS-VPNenvironment,whatistheeffectofconfiguringanidenticalsetofroutetargetsforaparticularVRFbutthenconfiguringanonidenticalRDacrossmultiplePEdevices?A)TheroutesarcrejectedbytheremotePEbecausetheyhaveadifferentRDthanitsroutes.B)Theroutesarecorrectlymanagedbythecontrolplane,butthereareinstanceswhereroutestakeuptwiceasmuchmemory.C)TheroutesarenotsenttoanyremotePEwithadifferentRD.D)TheroutespropagatetotheremotePE.butthePEneverinstallstheminitsforwardingtable.答案:B解析:[单选题]21.Howdoclouddeploymentsdifferfromon-premdeployments?A)Clouddeploymentsaremorecustomizablethanon-premisesdeploymentsB)Clouddeploymentsrequirelongerimplementationtimesthanon-premisesdeploymentsC)Clouddeploymentsrequirelessfrequentupgradesthanon-premisesdeploymentsD)Clouddeploymentshavelowerupfrontcoststhanon-premisesdeployments答案:D解析:[单选题]22.AnetworkadministratorispreparingaPythonscripttoconfigureaCiscoIOSXE-baseddeviceonthenetwork.Theadministratorisworriedthatcolleagueswillmakechangestothedevicewhilethescriptisrunning.Whichoperationoftheclientmanagerinpreventcolleaguemakingchangestothedevicewhilethescriptisrunning?A)m.lock(config=?running?)B)m.lock(target=?running?)C)m.freeze(target=?running?)D)m.freeze(config=?running?)答案:B解析:[单选题]23.Aferyouapplythegivenconfigurationtoarouter,theDHCPclientsbehindthedevicecannotcommunicatewithhostsoutsideoftheirsubnet.Whichactionismostlikelytocorrecttheproblem?A)ConfigurethednsserveronthesamesubnetastheclientsB)ActivatethedhcppoolC)CorrectthesubnetmaskD)configurethedefaultgateway答案:D解析:在将给定的配置应用到路由器之后，设备后面的DHCP客户机就不能这样做了与子网之外的主机通信。哪种行动最有可能纠正这个问题?D配置默认网关[单选题]24.Forwhichroutesdoesthedistancebgp105070commandsettheadministrativedistance?A)forBGPinternalroutesonlyB)forallBGProutesC)forBGPexternalroutesonlyD)betweenBGProutesandIGProutes答案:B解析:bgp105070命令为哪些路线设置管理距离？B.对于所有BGP路由[单选题]25.Whichpasswordmustanengineerusetoentertheenablemode?class="fr-ficfr-dibcursor-hover"A)adminadmin123B)defaultC)testing1234D)cisco123答案:C解析:[单选题]26.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]27.HowdoesafabricAPfitinthenetwork?A)ItisinlocalmodeandmustbeconnecteddirectlytothefabricbordernodeB)ItisinFlexConnectmodeandmustbeconnecteddirectlytothefabricbordernodeC)ItisinlocalmodeanmustconnecteddirectlytothefabricedgeswitchD)ItisinFlexConnectmodeandmustbeconnecteddirectlytothefabricedgeswitch答案:C解析:[单选题]28.Whichcommandcanyouentertoconfigureabuilt-inpolicerwithminimumguaranteedbandwidthwithoutstarvingotherclassesduringperiodsofcongestion?A)BANDWIDTHREMAININGPERCENTB)BANDWIDTHC)PRIORITYPERCENTD)FAIR-QUEUE答案:C解析:[单选题]29.WhichmethodofaccountauthenticationdoesOAuth2.0withinRESTAPIs?A)username/rolecombinationB)accesstokensC)cookieauthenticationD)basicsignatureworkflow答案:B解析:[单选题]30.Ifconfiguringastaticdefaultrouteontherouterwiththeiproute120commandhowdoestherouterrespond?class="fr-ficfr-dibcursor-hover"A)ItignoresthenewstaticrouteuntiltheexistingOSPFdefaultrouteisremovedB)ItimmediatelyreplacestheexistingOSPFrouteintheroutingtablewiththenewlyconfiguredstaticrouteC)Itstartsload-balancingtrafficbetweenthetwodefaultroutesD)ItstartssendingtrafficwithoutaspecificmatchingentryintheroutingtabletoGigabitEthernet0/1答案:A解析:[单选题]31.WhenisitusefilltodisablesplithorizononanEIGRPinterface?A)DISABLEITWHENYOUWANTTOPROVIDEADDITIONALBACKUPPATHSINYOURNETWORK.B)DISABLEITWHENYOUWANTTOSENDROUTESTHATARCLEARNEDFROMANOTHERROUTINGPROTOCOLTOPEEROILTHESAMEINTERFACE.C)DISABLEITWHENYOUNEEDTOSENDUPDATESTOPEERSONTHEINTERFACEONWHICHTHEUPDATESWERERECEIVED.D)ITISNEVERADVISABLETODISABLESPLITHORIZONONANEIGRPINTERFACE.答案:C解析:[单选题]32.WhichtypeofaccesslistcomparessourceanddestinationIPaddress?A)standardB)extendedC)IPnamedD)reflexive答案:B解析:哪种访问列表比较源和目标IP地址？B.扩展[单选题]33.howmanyaddressfamiliescanasingleOSPFV3instancesupport?A)1B)2C)5D)10答案:A解析:[单选题]34.HowdotraditionalcampusdevicemanagementandCiscoDNACenterdevicemanagementdifferinregardstodeployment?A)CiscoDNACenterdevicemanagementcanbeimplementedatalowercostthanmosttraditionalcampusdevicemanagementoptionsB)TraditionalcampusdevicemanagementschemescantypicallydeploypatchesandupdatesmorequicklythanCiscoDNACenterdevicemanagement.C)CiscoDNACenterdevicemanagementcandeployanetworkmorequicklythantraditionalcampusdevicemanagementD)TraditionalcampusdevicemanagementallowsanetworktoscalemorequicklythanwithCiscoDNACenterdevicemanagement.答案:C解析:[单选题]35.WhichstatementaboutSTPportstatesistrue?A)APORTINTHEBLOCKINGSTATEREMAINSINTHATSTATEFOR30SECONDSBEFORETRANSITIONINGTOTHELISTENINGSTATE.B)LISTENINGANDLEARNINGARCTRANSITORYPORTSTATESTHATUSETHEFORWARDDELAYTIMER.C)WHENAPORTTRANSITIONSTOTHELEARNINGSTATE,ITCANSENDANDRECEIVEDATAFRAMESD)APORTINTHEBLOCKINGSTATELEARNSADDRESSANDRECEIVESBPDUS答案:B解析:[单选题]36.AcustomertransitionsawiredenvironmenttoaCiscoSD-Accesssolution.ThecustomerDoesnotwanttointegratethewirelessnetworkwiththefabric.WhichwirelessdeploymentApproachenablesthetwosystemstocoexistandmeetsthecustomerrequirement?A)Deployaseparatenetworkforthewirelessenvironment.B)ImplementaCiscoDNACentertomanagethetwonetworks.C)Deploythewirelessnetworkoverthetopofthefabric.D)DeploytheAPsinautonomousmode.答案:B解析:[单选题]37.Ifanotice-levelmessagingissenttoasyslogserver,whicheventhasoccurred?A)AnetworkdevicehasrestartedB)AnARPinspectionhasfailedC)AroutinginstancehasflappedD)Adebugoperationisrunning答案:C解析:[单选题]38.WhichCiscoFlexConnectstateallowswirelessusersthatareconnectedtothenetworktoContinueworkingaftertheconnectiontotheWLChasbeenlost?A)AuthenticationDown/SwitchingDownB)Authentication-Central/Switch-LocalC)Authentication-Down/Switch-LocalD)Authentication-Central/Switch-Central答案:C解析:DOWN&Local[单选题]39.QUESTION11Refertotheexhibit.WhichstatementabouttheOPSFdebugoutputistrue?A)TheoutputdisplaysOSPFhellomessageswhichrouterR1hassentorreceivedoninterfaceFa0/1.B)TheoutputdisplaysOSPFmessageswhichrouterR1hassentorreceivedonallinterfaces.C)TheoutputdisplaysOSPFmessageswhichrouterR1hassentorreceivedoninterfaceFa0/1.D)TheoutputdisplaysOSPFhelloandLSACKmessageswhichrouterR1hassentorreceived.答案:A解析:[单选题]40.''HTTP/1.1204NoContent''isreturnedwhenthecurl-i-xDELETEcommandisissued.whichsituationhasoccurred?A)TheobjectcouldnotbelocatedattheURLpathB)ThecommandsucceededindeletingtheobjectC)TheobjectwaslocatedatheURL,butitcouldnotbedeletedD)TheURLwasinvalid答案:B解析:[单选题]41.WhichaccesscontrolslistallowsonlyTCPtrafficwithadestinationportrangeof22-443,excludingport80?A)Denytcpanyanyeq80Permittcpanyanygt21lt444B)Permittcpanyanyneq80C)Permittcpanyanyrange22443Denytcpanyanyeq80D)Denytcpanyanyneq80Permittcpanyanyrange22443答案:A解析:[单选题]42.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]43.WhichvaluedocsEIGRPusetodeterminethemetricforasummaryaddress?A)THEAVERAGEOFTHECOMPONENTMETRICSB)ADEFAULTFIXEDVALUEC)THELOWESTMETRICAMONGTHECOMPONENTROUTESD)THEHIGHESTMETRICAMONGTHECOMPONENTROUTES答案:C解析:[单选题]44.OnwhichporttypewouldyouconfigureSTPPortFastBPDUguard?A)ROOTPORTSB)DESIGNATEDPORTSC)HOSTPORTSD)ALTERNATEPORTS答案:C解析:[单选题]45.WhenusingRapidPVST+,whichcommandguaranteestheswitchisalwaystherootbridgeforVLAN200?A)Spanning-treevlan200priority614440B)Spanning-treevlan200priority0C)Spanning-treevlan200priority38572422D)Spanning-treevlan200rootprimary答案:B解析:[单选题]46.Accordingtothenetworkingbestpractices,whichnetworkdeviceshouldbeusedforoptimizationandratelimiting?A)THEPROVIDERCOREDEVICEB)THEPROVIDEREDGEDEVICEC)THECUSTOMERCOREDEVICED)THECOUSTOMEREDGEDEVICE答案:D解析:[单选题]47.whichkeychaincryptographicalgorithmissupportedbytheIS-ISroutingprotocol?A)HMAC-SHA1-12B)HMAC-MD5C)MD5D)HMAC-SHA1-20答案:B解析:[单选题]48.WhichIPsecsecurityprotocolshouldbeusedwhenconfidentialityisrequired?A)MD5B)PSKC)AHD)ESP答案:D解析:当需要保密时，应该使用哪种IPsec安全协议?DESP[单选题]49.Awirelessconsultantisdesigningahigh-densitywirelessnetworkforalecturehallfor1000students.Whichantennatypeisrecommendedforthisenvironment?A)sectorantennaB)dipoleantennaC)parabolicdishD)omnidirectionalantenna答案:D解析:[单选题]50.IfthemaximumpowerlevelassignmentforglobalTPC802.11a/n/acisconfiguredto10dBm,whichpowerleveleffectivelydoublestheTransmitpower?A)13dBmB)14dBmC)17dBmD)20dBm答案:C解析:[单选题]51.Whichnetworkactionoccurswithinthedataplane?A)comparethedestinationIPaddresstotheIProutingtable.B)runroutingprotocols(OSPF,EIGRP,RIP,BGP)C)makeaconfigurationchangefromanincomingNETCONFRPCD)replytoanincomingICMPechorequest答案:A解析:[单选题]52.whichoptionsistheimplicitaccessruleforIPV6acls?A)PERMITALLB)PERMITNEIGHBORDISCOVERY,DENYEVERYTHINGELSEC)DENYALLD)PERMITALLICMP,DENYEVERYTHINGELSE答案:B解析:[单选题]53.refertotheexhibit.Whichconfigurationmustyouapplytoroutersothatitcangeneratealogmessageinthegivenformat?A)SERVICEALIGNMENTLOGGINGB)SERVICETIMESTAMPSLOGDATETIMEC)SERVICETIMESTAMPSLOGUPTIMED)SERVICESEQUENCE-NUMBERS答案:C解析:[单选题]54.WhichHTTPstatuscodeisthecorrectresponseforarequestwithanincorrectpasswordappliedtoaRESTAPIsession?A)HTTPStatusCode:200B)HTTPStatusCode:302C)HTTPStatusCode:401D)HTTPStatusCode:504答案:C解析:[单选题]55.AfteryouconfigureaDHCPserveronVLAN10toserviceclientsonVLAN10andVLAN20.clientsonVLAN10aregivenIPaddressassignments,butclientsonVLAN20failtoreceiveIPaddresses.Whichactionmustyoutaketocorrecttheproblem?A)ConfiguretheiphelperaddresscommandintheDHCPserverconfiguration.B)ConfiguretheDNSnameoptionintheDHCPserverconfigurationC)ConfigureaseparateDHCPserveronVLAN20D)ConfigurethedefaultgatewayintheDHCPseverconfiguration答案:C解析:在VLAN10上配置一个DHCP服务器以服务VLAN10和VLAN20上的客户机之后。VLAN10上的客户机获得IP地址分配，但VLAN20上的客户机无法接收IP地址。你必须采取什么措施来纠正这个问题？c.在VLAN20上配置单独的DHCP服务器[单选题]56.which802.11frametypeisassociationreponse?A)managementB)protectedframeC)actionD)control答案:A解析:[单选题]57.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]58.ShortlyafterSiteAwasconnectedtoSiteBoveranewsingle-modefiberpath.usersatSiteAreportintermittentconnectivityissueswithapplicationshostedatSiteB.Whatisthecauseoftheintermittentconnectivityissue?class="fr-ficfr-dibcursor-hover"A)InterfaceerrorsareincrementingB)AnincorrectSFPmediatypewasusedatSiteAC)HighusageiscausinghighlatencyD)Thesiteswereconnectedwiththewrongcabletype答案:C解析:[单选题]59.WhatdoCiscoDNAsouthboundAPIsprovide?A)interfacebetweenthecontrollerandtheconsumerB)RESTfulAPIinterfacefororchestratorcommunicationC)interfacebetweenthecontrollerandthenetworkdevicesD)NETCONFAPIinterfacefororchestratorcommunication答案:C解析:[单选题]60.HowdoEIGRPmetricscomparetoOSPFmetrics?A)TheEIGRPadministrativedistanceforexternalroutesis170,andtheOSPFAdministrativedistanceforexternalroutesis110B)EIGRPusestheDijkstraalgorithm,andOSPFusesTheDUALalgorithmC)TheEIGRPadministrativedistanceforexternalroutesis170,andtheOSPFAdministrativedistanceforexternalroutesisundefinedD)EIGRPmetricsarebasedonacombinationofbandwidthandpacketloss,andOSPFMetricsarebasedoninterfacebandwidth答案:A解析:[单选题]61.WhatfunctiondoesVXLANperforminanSD-Accessdeployment?A)policyplaneforwardingB)controlplaneforwardingC)dataplaneforwardingD)systemsmanagementandorchestration答案:C解析:VXLAN=dataplaneforwarding[单选题]62.Ifthenoiseflooris-90dBmandthewirelessclientisreceivingasignalof-75dBm,whatistheSNR?A)15B)1.2C)-165D)83答案:A解析:[单选题]63.Whatcausesaporttobeplacedintheerr-disabledstate?A)latencyB)portsecurityviolationC)shutdowncommandissuedontheportD)nothingpluggedintotheport答案:B解析:[单选题]64.ThenetworkadministratorwantsVLAN67traffictobeuntaggedbetweenSwitch1andSwitch2whileallotherVLANsaretoremaintagged.Whichcommandaccomplishesthistask?class="fr-ficfr-dibcursor-hover"A)switchportaccessvlan67B)switchporttrunkallowedvlan67C)switchportprivate-vlanassociationhost67D)switchporttrunknativevlan67答案:D解析:[单选题]65.AcustomerwantstoconnectadevicetoanautonomousCiscoAPconfiguredasaWGB.TheWGBisconfiguredproperly:however,itfailstoassociatetoaCAPWAP-enabledAP.WhichChangemustbeappliedintheadvancedWLANsettingstoresolvethisissue?A)EnableAironetIE.B)Enablepassiveclient.C)DisableAAAoverride.D)DisableFlexConnectlocalswitching.答案:A解析:[单选题]66.WhichgoalisachievedbytheimplementationofprivateIPv4addressingonanetwork?A)providesanaddedlevelofprotectionagainstInternetexposureB)providesareductioninsizeoftheforwardingtableonnetworkroutersC)allowscommunicationacrosstheInternettootherprivatenetworksD)allowsserversandworkstationstocommunicateacrosspublicnetworkboundaries答案:A解析:[单选题]67.Anengineermustprotecttheircompanyagainstransomwareattacks.Whichsolutionallowstheengineertoblocktheexecutionstageandpreventfileencryption?A)UseCiscoAMPdeploymentwiththeMaliciousActivityProtectionengineerenabledB)UseCiscoAMPdeploymentwiththeExploitPreventionengineenabledC)UseCiscoFirepowerandblocktraffictoTORnetworksD)UseCiscoFirepowerwithIntrusionPolicyandsnortrulesblockingSMBexploitation答案:A解析:[单选题]68.whichfeaturemonitorsnetworkeventsandtakesautomatedactionbasedonscriptsconfiguredbytheadministrator?A)EPCB)EEMC)PERFORMANCEMONITORD)NETFLOW答案:B解析:[单选题]69.WhichbehaviorcanbeexpectedwhentheHSRPversionsischangedfrom1to2?A)EachHSRPgroupreinitializesbecausethevirtualMACaddresshaschangedB)Nochangesoccurbecauseversion1and2usethesamevirtualMACOUIC)EachHSRPgroupreinitializesbecausethemulticastaddresshaschangedD)Nochangesoccurbecausethestandbyrouterisupgradedbeforetheactiverouter答案:A解析:[单选题]70.WhichIPSLAoperationtypeisenhancedbytheuseoftheIPSLAsResponder?A)DNSB)HTTPC)ICMPECHOD)UDPECHO答案:D解析:[单选题]71.R1haslearnedroute/24viaIS-IS.OSPF,RIP.andInternalEIGRPUndernormaloperatingconditions,whichroutingprotocolisinstalledintheroutingtable?A)<li>IS-IS</li>B)RIPC)InternalEIGRPD)OSPF答案:C解析:EIGRP的AD最低，所以选择安装EIGRP协议class="fr-ficfr-dib"[单选题]72.AnengineermustconfigureanACLthatpermitspacketswhichincludeanACKintheTCPheader.WhichentrymustbeincludedintheACL?A)access-list110permittepanyanyeq21establishedB)access-list110permittepanyanyeq21tcp-ackC)access-list10permittepanyanyeq21establishedD)access-list10permitipanyanyeq21tcp-ack答案:A解析:[单选题]73.ApacketisbeingsentacrossrouterR1tohost4.Whatisthedestinationrouteforthepacket?class="fr-ficfr-dibcursor-hover"A)54viaSerial0/0/1B)54viaSerial0/0/0C)46viaSerial0/1/0D)50viaSerial0/0/0答案:A解析:[单选题]74.RouterR1hasastaticroutethatisconfiguredtodestinationnetwork.AdirectlyconnectedinterfaceisconfiguredwithanIPaddressinthesamedestinationnetwork.WhichstatementaboutR1istrue?A)R1refusestoadvertisethedynamicroutetootherneighborsB)R1prefersthestaticrouteC)R1prefersthedirectlyconnectedinterfaceD)R1sendsawithdrawalnotificationtotheneighboringrouter答案:C解析:路由器R1有一个配置到目标网络的静态路由。一个直接已连接接口在相同的目标中配置一个IP地址网络。关于R1，哪个陈述是正确的?CR1更喜欢直接连接的接口[单选题]75.Anorganizationsecuresitsnetworkwithmulti-factorauthenticationusinganauthenticatorapponemployeesmartphones.HowistheapplicsecuredinthecaseofAuser?ssmartphonebeinglostorstolen?A)TheapplicationrequirestheusertoenteraPINbeforeitprovidesthesecondfactorB)theapplicationchallengesauserbyrequiringanadministratorpasswordtoreactivatewhenthesmartphoneisrebootedC)TheapplicationrequiresanaadministratorpasswordtoreactivateafteraconfiguredintervalD)Theapplicationverifiesthattheuserisinaspecificlocationbeforeitprovidesthesecondfactor答案:A解析:[单选题]76.AclientdevicefailstoseetheenterpriseSSID,butotherdevicesareconnectedtoit.Whatisthecauseofthisissue?A)ThehiddenSSIDwasnotmanuallyconfiguredontheclient.B)ThebroadcastSSIDwasnotmanuallyconfiguredontheclient.C)TheclienthasincorrectcredentialsstoredfortheconfiguredhiddenSSID.D)TheclienthasincorrectcredentialsstoredfortheconfiguredbroadcastSSID.答案:A解析:[单选题]77.WhichLISPcomponentisrequiredforaLISPsitetocommunicatewithanon-LISPsite?A)ETRB)ITRC)ProxyETRD)ProxyITR答案:C解析:[单选题]78.Ifaclient?sradiodevicereceivesasignalstrengthof-67dBmandthenoiseflooris-85dBm,WhatistheSNRvalue?A)15dBB)16dBC)18dBD)20dB答案:C解析:[单选题]79.WhatisonedifferencebetweenSaltstackandAnsible?A)SaltStackusesanAPIproxyagenttoprogramCiscoboxesonagentmode,whereasAnsibleusesaTelnetconnectionB)SaltStackusestheAnsibleagentonthebox,whereasAnsibleusesaTelnetserverontheBoxC)SaltStackisconstructedwithminion,whereasAnsibleisconstructedwithYAMLD)SaltStackusesSSHtointeractwithCiscodevices,whereasAnsibleusesaneventbus答案:C解析:[单选题]80.AnNSSAareahastwoABRsconnectedtoArea0.Whichstatementistrue?A)BothABRstranslateTypc-7LSAstoTypc-5LSAs.B)TheABRwiththehighestrouterIDtranslatesTypc-7LSAstoTypc-5LSAs.C)NoLSAtranslationisneeded.D)BothABRsforwardType-5LSAsfromtheNSSAareatobackbonearea.答案:B解析:[单选题]81.Whatbenefitdoescontroller-basednetworkingprovideversustraditionalnetworking?A)providesanaddedlayerofsecuritytoprotectfromDDoSattacksB)combinescontrolanddataplanefunctionalityonasingledevicetominimizelatencyC)movesfromatwo-tiertoathree-tiernetworkarchitecturetoprovidemaximumredundancyD)allowsconfigurationandmonitoringofthenetworkfromonecentralizedpoint答案:D解析:[单选题]82.WhichmethoddisplaystextdirectlyintotheactiveconsolewithasynchronousEEMappletpolicy?A)eventmanagerappletboomEventsyslogpattern?UP?Action1.0syslogprioritydirectmsg?loggingdirectlytoconsole?B)eventmanagerappletboomeventsyslogpattern?UP?Action1.0gets?loggingdirectlytoconsole?C)eventmanagerappletboomeventsyslogpattern?UP?Action1.0string?loggingdirectlytoconsole?D)eventmanagerappletboomeventsyslogpattern?UP?Action1.0puts?loggingdirectlytoconsole?答案:D解析:[单选题]83.WhichLISPinfrastructuredeviceprovidesconnectivitybetweennon-LISPsitesandLISPsitesbyreceivingnon-LISPtrafficwithaLISPsitedestination?A)PETRB)PITRC)mapresolverD)mapserver答案:B解析:[单选题]84.AnetworkengineerimplementsISISforIPv6andthendiscoversthatISISadjacenciesategoingdown.Whichactioncanbetakentoficthisproblem?A)ENABLEMULTITOPOLOGYONTHEISISDOMAINB)CONFIGURELINKLOCALIPV6ADDRESSONISISINTERFACEC)CHANGETHEIS-TYPEONALLISISROUTERSTOLEVEL-2-ONLYD)ENABLEISISFORIPV6ONLOOPBACKINTERFACES答案:D解析:[单选题]85.Whenawirelessclientroamsbetweentwodifferentwirelesscontrollers,anetworkconnectivityoutageisexperienceforaperiodoftime.Whichconfigurationissuewouldcausethisproblem?A)AllofthecontrollerswithinthemobilitygroupareusingthesamevirtualinterfaceIPaddressB)AllofthecontrollersinthemobilitygroupareusingthesamemobilitygroupnameC)NotallofthecontrollersinthemobilitygroupareusingthesamemobilitygroupnameD)NotallofthecontrollerswithinthemobilitygroupareusingthesamevirtualinterfaceIPaddress答案:D解析:[单选题]86.WhatdoCiscoDNAsouthboundAPIsprovide?A)InterfacebetweenthecontrollerandthenetworkdevicesB)NETCONFAPIinterfacefororchestrationcommunicationC)RESTfulAPIinterfacefororchestratorcommunicationD)Interfacebetweenthecontrollerandtheconsumer答案:A解析:[单选题]87.Refertotheexhibit.Whichconfigurationmustyouapplytoroutersothatitcangeneratealogmessageinthegivenformat?A)ServicealignmentloggingB)ServicetimestampslogdatetimeC)ServicetimestampsloguptimeD)Servicesequence-numbers答案:C解析:[单选题]88.AnengineermustconfigureanewWLANthatallowsausertoenterapassphraseandprovidesForwardsecrecyasasecuritymeasure.WhichLayer2WLANconfigurationisrequiredontheCiscoWLC?A)WPA2PersonalB)WPA3EnterpriseC)WPA3PersonalD)WPA2Enterprise答案:C解析:[单选题]89.OnwhichprotocolortechnologyisthefabricdataplanebasedinCiscoSD-Accessfabric?A)VXLANB)LISPC)CiscoTrustSecD)IS-IS答案:A解析:[单选题]90.Howaremap-registermessagessentinaLISPdeployment?A)egresstunnelrouterstomapresolverstodeterminetheappropriateegresstunnelrouterB)ingresstunnelrouterstomapserverstodeterminetheappropriateegresstunnelrouterC)egresstunnelrouterstomapserverstodeterminetheappropriateegresstunnelrouterD)ingresstunnelrouterstomapresolverstodete