思科认证互联网专家CCIE考试(习题卷6)

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6)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.Whichunitisusedtoexpressthesignal-to-noseratio?A)MwB)AmpC)DbD)Dbm答案:C解析:[单选题]2.AclientwithIPaddress5mustaccessawebserveronport80at25.Toallowthistraffic,anengineermustaddastatementtoanaccesscontrollistthatisappliedintheinbounddirectionontheportconnectingtothewebservers.Whichstatementallowsthistraffic?A)permittcphost25lt80host5B)permittcphost5host25eq80C)permittcphost25eq80host5D)permittcphost25host5eq80答案:C解析:[单选题]3.yournetflowcollectorisnotworkingduetoalargeamountoftrafficenteringyournetworkwhichisdestinedtoasingleIPaddress.Whichnetflowfeatureallowsyoutocollectthetopsourcehostsforthistrafficonthelocalrouter?A)ANETFLOWCANEXPORTFLOWSONLYTOAEXTERMALFLOWCOLLECTORB)SHOWIPCACHEFLOWC)IPACCOUNTINGD)IPFLOW-TOP-TALKERS答案:D解析:[单选题]4.WhichIPSLAoperationtypeusesIPtomeasuretheround-triptimebetweenarouterandadevice?A)HTTPB)ICMPECHOC)ICMPPATHJITTERD)UDPJITTERFORVOIP答案:B解析:[单选题]5.AnengineerisconfiguringlocalwebauthenticationonaWLAN.TheengineerchoosestheAuthenticationradiobuttonundertheLayer3SecurityoptionsforWebPolicy.WhichdevicepresentsthewebauthenticationfortheWLAN?A)ISEserverB)RADIUSserverC)anchorWLCD)localWLC答案:D解析:[单选题]6.whichcommandcanyouentertoconfigureabuilt-inpolicerwithminimumguaranteedbandwidthwithoutstarvingotherclassesduringperiodsofcongestion?A)BANDWIDTHREMAININGPERCENTB)BANDWIDTHC)PRIORITYPERCENTD)FAIR-QUEUE答案:C解析:[单选题]7.Insoftwaredefinedarchitectures,whichplaneisdistributedandresponsiblefortrafficforwarding?A)managementplaneB)controlplaneC)policyplaneD)dataplane答案:D解析:[单选题]8.AclientdevicefailstoseetheenterpriseSSID,butotherdevicesareconnectedtoit.Whatisthecauseofthisissue?A)ThehiddenSSIDwasnotmanuallyconfiguredontheclient.B)ThebroadcastSSIDwasnotmanuallyconfiguredontheclient.C)TheclienthasincorrectcredentialsstoredfortheconfiguredhiddenSSID.D)TheclienthasincorrectcredentialsstoredfortheconfiguredbroadcastSSID.答案:A解析:[单选题]9.whichoptiondescribeshowarouterrespondsifLSAthrottlingisconfiguredanditreceivestheidenticalLSAbeforetheintervalisset?A)THELSAISADDEDTOTHEOSPFDATABASEANDANOTIFICATIONISSENTTOTHESENDINGROUTERTOSLOWDOWNITSLSAPACKETUPDATES.B)THELSAISADDEDTOTHEOSPFDATABASE.C)THELSAISIGNORED.D)THELSAISIGNOREDANDANOTIFICATIONISSENTTOTHESENDINGROUTERTOSLOWDOWNITSLSAPACKETUPDATES答案:C解析:[单选题]10.WhichmeasuredoesISISusetoavoidsendingtrafficwithawrongMTUconfiguration?A)ISISDOESNOTPROTECTFROMMTUMISMATCH.B)MTUVALUEISCOMMUNICATEDINISISSEQUENCENUMBERPDUS(SNP),ANDISISADJACENCYISNOTESTABLISHEDIFAUMTUMISMATCHISDETECTED.C)ISISUSESPATHMTUDISCOVERYASSPECIFIEDINRFC1063.D)ISISUSESPADDINGOFHELLOPACKETSTOFRILLMTU.答案:D解析:[单选题]11.whichDHCPmessagetypedoestheDHCPserversendtoclienttoconfirmitsallocatedIPaddress?A)DHCPDISCOVERB)DHCPOFFERC)DHCPREQUESTD)DHCPACK答案:D解析:[单选题]12.AportsecurityviolationhasoccurredonaswitchportduetothemaximumMACaddresscountbeingexceeded,whichcommandmustBeconfiguredtoincrementthesecurity-violationcountandforwardanSNMPtrap?A)Switchportport-securityviolationaccessB)Switchportport-securityviolationprotectC)Switchportport-securityviolationrestrictD)Switchportport-securityviolationshutdown答案:D解析:[单选题]13.whichpathisusedbytherouterforinternettraffic?class="fr-ficfr-dibcursor-hover"A)/27B)/28C)/0D)/24答案:C解析:[单选题]14.WhichDHCPmessagetypedoestheDHCPserversendtoclienttoconfirmitsallocatedIPaddress?A)DHCPDISCOVERB)DHCPOFFERC)DHCPREQUESTD)DHCPACK答案:D解析:[单选题]15.Thedefault-informationoriginatecommandisconfiguredundertheR1OSPFconfigurationAftertestingworkstationsonVLAN20atSiteBcannotreachaDNSserverontheInternet.Whichactioncorrectstheconfigurationissue?class="fr-ficfr-dibcursor-hover"A)Addthedefault-informationoriginatecommandonR2B)Configuretheiproute8commandonR1C)ConfiguretheiproutecommandonR2D)Addthealwayskeywordtothedefault-informationoriginatecommandonR1答案:B解析:[单选题]16.WhenusingRapidPVST+,whichcommandguaranteestheswitchisalwaystherootbridgeforVLAN200?A)Spanning-treevlan200priority614440B)Spanning-treevlan200priority0C)Spanning-treevlan200priority38572422D)Spanning-treevlan200rootprimary答案:B解析:[单选题]17.WhatcommandcanyouentertoenableclientautoconfigurationoveranISATAPtunnel?A)tunnelmodeipv6ipisatapB)noipv6ndrasuppressC)ipv6ndrasuppressD)tunnelmodeipv6ip6rd答案:B解析:[单选题]18.WhichHHTPstatuscodeisthecorrectresponseforarequestwithanincorrectpasswordappliedtoaRESTAPIsession?A)HTTPStatusCode200B)HTTPStatusCode302C)HTTPStatusCode401D)HTTPStatusCode:504答案:C解析:[单选题]19.WhenawiredclientconnectstoanedgeswitchinanSDAfabric,whichcomponentdecideswhethertheclienthasaccesstothenetwork?A)control-planenodeB)IdentityServiceEngineC)RADIUSserverD)edgenode答案:B解析:[单选题]20.Whatcausesaporttobeplacedintheerr-disabledstate?A)latencyB)portsecurityviolationC)shutdowncommandissuedontheportD)nothingpluggedintotheport答案:B解析:[单选题]21.WhichcongestionqueuingmethodonCiscoIOSbasedroutersusesfourstaticqueues?A)lowlatencyB)customC)weightedfairD)Priority答案:D解析:[单选题]22.InOSPF,whichLSAtypeisresponsibleforpointingtotheASBRrouter?A)type1B)type2C)type3D)type4答案:D解析:[单选题]23.YouareconfiguringCos-to-DSCPmappingswiththreerequirementsCOS1mustbetranslatedintoAP13COS2mustbetranslatedintoAF22COS5mustbetranslatedintoEFWhichconfigurationcommandcanyouusetoimplementtherequirements?A)MLSQOSMAPCOS-DSCP014202432464856B)MLSQOSMAPCOS-DSCP012182432464856C)MLSQOSMAPCOS-DSCP012182432404856D)MLSQOSMAPCOS-DSCP012182432464856答案:A解析:[单选题]24.Toincreasetotalthroughputandredundancyonthelinksbetweenthewirelesscontrollerandswitch,thecustomerenabledLAGonthewirelesscontroller.WhichEtherChannelmodemustbeconfiguredontheswitchtoallowtheWLCtoconnect?A)ActiveB)PassiveC)OnD)Auto答案:C解析:[单选题]25.WhichnetworkallowsdevicestocommunicatewithouttheneedtoaccesstheInternet?A)/16B)/16C)/8D)/24答案:B解析:[单选题]26.WhichoutputdisplaysaJSONdatarepresentation?class="fr-ficfr-dibcursor-hover"A)OptionAB)OptionBC)OptionCD)OptionD答案:C解析:[单选题]27.AvulnerabilityassessmenthighlightedthatremoteaccesstotheswitchesispermittedusingUnsecureandunencryptedprotocolsWhichconfigurationmustbeappliedtoallowonlySecureandreliableremoteaccessfordeviceadministration?A)linevty015LoginlocalTransportinputnoneB)linevty015LoginlocalTransportinputsshC)linevty015LoginlocalTransportinputtelnetsshD)linevty015LoginlocalTransportinputall答案:B解析:[单选题]28.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]29.WhendoesaCiscoStackWiseprimaryswitchloseitsrole?A)whenthepriorityvalueofastackmemberischangedtoahighervalueB)whenastackmemberfailsC)whenaswitchwithahigherpriorityisaddedtothestackD)whenthestackprimatyisreset答案:D解析:[单选题]30.Anofficehas8floorswithapproximately30-40usersperfloor.WhatcommandmustbeconfiguredontherouterSwitchedVirtualInterfacetouseaddressspaceefficiently?A)ipaddressB)ipaddressC)ipaddress28D)ipaddress24答案:B解析:8个子网，选择B[单选题]31.WhichalgorithmisusedfortheframechecksequenceinanEthernetframe?A)MD5B)AES-256C)CRCD)SHA-1答案:C解析:哪种算法用于以太网帧中的帧检查序列？[单选题]32.ANengineerisimplementingMPLSOAMtomonitortrafficwithintheMPLSdomain.WhichactionmusttheEngineerperformtopreventfrombeingforwardedbeyondtheserviceproviderdomainwhentheLSPisDown?A)DisableIPredirectsonlyonoutboundinterfacesB)ImplementthedestinationaddressfortheLSPechorequestpacketinthe127.x.y.z/8networkC)DisableIPredirectsonallingressinterfacesD)ConfigureaprivateIPaddressasthedestinationaddressoftheheadendrouterofCiscoMPLSTE.答案:C解析:[单选题]33.WhichkeychaincryptographicalgorithmissupportedbytheIS-ISroutingprotocol?A)HMAC-SHA1-12B)HMAC-MD5C)MD5D)HMAC-SHA1-20答案:B解析:[单选题]34.whichneighbor-discoverymessagetypeisusedtoverifyconnectivitytoaneighborwhenthelink-layeraddressoftheneighborisknown?A.neighborsolicitationA)NEIGHBORSOLICITATIONB)NEIGHBORADVERTISEMENTC)ROUTERADVERTISEMENTD)ROUTERSOLICITATION答案:A解析:[单选题]35.Whichunitisusedtoexpressthesignal-to-noiseratio?A)dBmB)dBC)ampD)mW答案:B解析:[单选题]36.Aresponsecodeof404isreceivedwhileusingtheRESTAPIonCiscoDNACentertoPOSTtothisURL/dna/intent/api/v1/template-programmer/projectWhatdoesthecodemean?A)TheclientmadearequestaresourcethatdoesnotexistB)TheserverhasnotimplementedthefunctionalitythatisneededtofulfilltherequestC)Therequestacceptedforprocessing,buttheprocessingwasnotcompletedD)ThePOST/PUTrequestwasfulfilledandanewresourcewascreated,informationabouttheresourceisintheresponsebody答案:A解析:[单选题]37.Howaremap-registermessagessentinaLISPdeployment?A)egresstunnelrouterstomapresolverstodeterminetheappropriateegresstunnelrouterB)ingresstunnelrouterstomapserverstodeterminetheappropriateegresstunnelrouterC)egresstunnelrouterstomapserverstodeterminetheappropriateegresstunnelrouterD)ingresstunnelrouterstomapresolverstodeterminetheappropriateegresstunnelrouter答案:C解析:出口隧道路由器映射服务器来确定合适的出口隧道路由器[单选题]38.WhichLISPinfrastructuredeviceprovidesconnectivitybetweennon-LISPsitesandLISPsitesbyreceivingnon-LISPtrafficwithaLISPsitedestination?A)PITRB)mapresolverC)mapserverD)PETR答案:A解析:[单选题]39.WhichEIGRPfeatureallowstheuseofleakmaps?A)OFFSET-LISTB)NEIGHBORC)ADDRESS-FAMILYD)STUB答案:D解析:[单选题]40.whichipv6first-hopsecurityfeatureblockstrafficsourcedfromipv6addressesthatarcoutsidetheprefixgleanedfromrouteradvertisements?A)IPV6RAGUARDB)IPV6DHCPGUARDC)IPV6SOURCEGUARDD)IPV6PREFIXGUARD答案:D解析:[单选题]41.YourNetFlowcollectorisnotworkingduetoalargeamountoftrafficenteringyournetworkwhichisdestinedtoasingleIPaddress.WhichNetFlowfeatureallowsyoutocollectthetopsourcehostsforthistrafficonthelocalrouter?A)ANETFLOWCANEXPORTFLOWSONLYTOAEXTERMALFLOWCOLLECTORB)SHOWIPCACHEFLOWC)IPACCOUNTINGD)IPFLOW-TOP-TALKERS答案:D解析:[单选题]42.HowdoTCPandUDPdifferinthewaythattheyestablishaconnectionbetweentwoendpoints?A)TCPusessynchronizationpackets,andUDPusesacknowledgmentpackets.B)UDPusesSYN,SYNACKandFINbitsintheframeheaderwhileTCPusesSYN,SYNACKandACKbitsC)UDPprovidesreliablemessagetransferandTCPisaconnectionlessprotocolD)TCPusesthethree-wayhandshakeandUDPdoesnotguaranteemessagedelivery答案:D解析:[单选题]43.Whichbenefitofimplementingadual-homedWANconnectioninsteadofasingle-homedconnectionistrue?A)Onlydual-homedconnectionssupportOSPFinconjunctionwithBGPB)Onlydual-homedconnectionssupportsplithorizonwithEIGRPC)Onlydual-homedconnectionsenbableanindividualroutertotoleratethelossofanetworklinkD)Onlydual-homedconnectionssupportrecursiverouting答案:C解析:实现双主广域网连接而不是单主广域网连接的哪些好处是正确的？c.只有双主连接才能使单个路由器承受网络链路的丢失[单选题]44.WhichAPmodeallowsanengineertoscanconfiguredchannelsforrogueaccesspoints?A)SnifferB)MonitorC)BridgeD)Local答案:B解析:[单选题]45.whattechnologyallowsaPEroutertoexchangevpnv4routeswithotherPErouters?A)MPLSL3VPNB)MPLSL2VPNC)VPLSD)FRAMERELAYTOATMAAL5INTERWORKING答案:A解析:[单选题]46.Accordingtothenetworkingbestpractices,whichnetworkdeviceshouldbeusedforoptimizationandratelimiting?A)THEPROVIDERCOREDEVICEB)THEPROVIDEREDGEDEVICEC)THECUSTOMERCOREDEVICED)THECOUSTOMEREDGEDEVICE答案:D解析:[单选题]47.ArouterrunningEIGRPhaslearnedthesameroutefromtwodifferentpaths.Whichparameterdoestherouterusetoselectthebestpath?A)costB)adminstrativedistanceC)metricD)as-path答案:C解析:[单选题]48.AuserconfiguredOSPFandadvertisedtheGigabitEthernetinterfaceinOSPFBydefault,whichtypeofOSPFnetworkdoesthisinterfacebelongto?A)point-to-multipointB)point-to-pointC)broadcastD)nonbroadcast答案:C解析:[单选题]49.Thenipservercommandhasbeenconfiguredonrouter1tomakeitanNTPclientofrouter2.Whichcommandmustbeconfiguredonrouter2sothatitoperatesinserver-onlymodeandreliesonlyonitsinternalclock?class="fr-ficfr-dibcursor-hover"A)Router2(config)#ntppassiveB)Router2(config)#ntpserverC)Router2(config)#ntpmaster4D)Router2(config)#ntpserver答案:D解析:[单选题]50.WhatisprovidedbytheStealthwatchcomponentoftheCiscoCyberThreatDefensesolution?A)real-timethreatmanagementtostopDDoSattackstothecoreandaccessnetworksB)real-timeawarenessofusers,devicesandtrafficonthenetworkC)malwarecontrolD)dynamicthreatcontrolforwebtraffic答案:B解析:[单选题]51.InCiscoSD-WAN,whichprotocolisusedtomeasurelinkquality?A)OMPB)BFDC)RSVPD)IPsec答案:B解析:[单选题]52.whatistheminimumEthernetframesize?A)32bytesB)64bytesC)1024bytesD)1500bytes答案:B解析:最小以太网帧大小是多少？[单选题]53.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]54.HowcananengineerpreventbasicreplayattacksfrompeoplewhotrytobruteforceasystemViaRESTAPI?A)UseHTTPSB)UseapasswordhashC)AddOAuthtotherequestintheAPIheaderD)AddatimestamptotherequestintheAPIheader答案:D解析:[单选题]55.AhostonanEthernetsegmenthasadifferentsubnetmaskthanthedefaultgateway.Whatcanbedonetoallowittocommunicatewithdevicesoutsideofthissubnet?A)CONFIGUREASTATICROUTEFORTHEHOSTONTHEDEFAULTGATEWAY.B)CONFIGUREASTATICARPENTRYONTHEDEFAULTGATEWAYFORTHEHOSTIPADDRESS.C)ENABLEGRATUITOUSARPONTHEHOST.D)ENABLEPROXYARPONTHEDEFAULTGATEWAY.答案:A解析:[单选题]56.TheloginmethodisconfiguredontheVTYlinesofarouterwiththeseparameters.-ThefirstmethodforauthenticationisTACACS-IfTACACSisunavailable,loginisallowedwithoutanyprovidedcredentialsWhichconfigurationaccomplishesthistask?A)R1#shrun|includeaaaaaanew-modelaaaauthenticationloginVTYgrouptacacs+noneaaasession-idcommonR1#shrun|sectionvtylinevty04password70202039485748R1#shrun|includeusernameR1#B)R1#shrun|includeaaaaaanew-modelaaaauthenticationlogindefaultgrouptacacs+aaasession-idcommonR1#shrun|sectionvtylinevty04transportinputnoneR1#C)R1#shrun|includeaaaaaanew-modelaaaauthenticationlogindefaultgrouptacacs+noneaaasession-idcommonR1#shrun|sectionvtylinevty04password70202039485748D)R1#shrun|includeaaaaaanew-modelaaaauthenticationlogintelnetgrouptacacs+noneaaasession-idcommonR1#shrun|sectionvtylinevty04R1#shrun|includeusernameR1#答案:C解析:[单选题]57.forwhichfeatureistheaddressfamily"Rtfilter"Used?A)ENHANCEDROUTEREFRESHB)MPLSVPNFILTERINGC)ROUTETARGETCONSTRAINTD)UNIFIEDMPLS答案:C解析:[单选题]58.WhichbehaviorcanbeexpectedwhentheHSRPversionsischangedfrom1to2?A)EachHSRPgroupreinitializesbecausethevirtualMACaddresshaschangedB)Nochangesoccurbecauseversion1and2usethesamevirtualMACOUIC)EachHSRPgroupreinitializesbecausethemulticastaddresshaschangedD)Nochangesoccurbecausethestandbyrouterisupgradedbeforetheactiverouter答案:A解析:[单选题]59.?HTTP/1.1204content?isreturnedwhencur-l-xDELETEcommandisissued.WhichSituationhasoccurred?A)TheobjectcouldnotbelocatedattheURIpathB)ThecommandsucceededindeletingtheobjectC)TheobjectwaslocatedattheURI,butitcouldnotbedeletedD)TheURIwasinvalid答案:B解析:[单选题]60.AtwhichlayerdoesCiscoDNACentersupportRESTcontrols?A)sessionlayerB)northboundAPIsC)EEMappletsorscriptsD)YAMLoutputfromresponsestoAPIcalls答案:B解析:[单选题]61.AnadministratormustenableTelnetaccesstoRouterXusingtherouterusernameandpasswordDatabaseforauthentication.Whichconfigurationshouldbeapplied?A)RouterX(config)#lineaux0RouterX(configline)#passwordciscoRouterX(config-line)#loginB)RouterX(config)#aaanew-modelRouterX(config)#aaaauthenticationloginauth-listlocalC)RouterX(config)#linevty04RouterX(config-line)#loginlocalRouterX(config-line)#endD)RouterX(config)#linevty04RouterX(config-line)#loginRouterX(config-line)#end答案:C解析:[单选题]62.Anorganizationsecuresitsnetworkwithmulti-factorauthenticationusinganauthenticatorapponemployeesmartphones.HowistheapplicsecuredinthecaseofAuser?ssmartphonebeinglostorstolen?A)TheapplicationrequirestheusertoenteraPINbeforeitprovidesthesecondfactorB)theapplicationchallengesauserbyrequiringanadministratorpasswordtoreactivatewhenthesmartphoneisrebootedC)TheapplicationrequiresanaadministratorpasswordtoreactivateafteraconfiguredintervalD)Theapplicationverifiesthattheuserisinaspecificlocationbeforeitprovidesthesecondfactor答案:A解析:[单选题]63.Whichsetofactionsatisfytherequirementformultifactorauthentication?A)Theuserswipesakeyfob,thenclicksthroughanemaillinkB)Theuserentersausernameandpassword,andthenclicksanotificationinanauthenticationapponamobiledeviceC)TheuserentersaPINintoanRSAtoken,andthenentersthedisplayedRSAkeyonaloginscreenD)Theuserentersausernameandpasswordandthenre-entersthecredentialsonasecondscreen答案:B解析:[单选题]64.WhatarethemaincomponentsofCiscoTrustSec?A)CiscoISEandEnterpriseDirectoryServicesB)CiscoISE.networkswitches,firewalls,androutersC)CiscoISEandTACACS+D)CiscoASAandCiscoFirepowerThreatDefense答案:C解析:[单选题]65.WhatisonecharacteristicoftheCiscoSD-Accesscontrolplane?A)ItstoresremoteroutesinacentralizeddatabaseserverB)EachrouterprocesseseverypossibledestinationandrouteC)ItallowshostmobilityonlyinthewirelessnetworkD)ItisbasedonVXLANtechnology答案:A解析:[单选题]66.whichLSAtypeisassociatedwiththedefaultrouteinatotallystubbyarea?A)INTERAREA-PREFIXLSAFORABRS(TYPE3)B)AUTONOMOUSSYSTEMEXTERNALLSA(TYPE5)C)ROUTERLSA(TYPE1)D)INTERAREA-ROUTERLSASFORASBRS(TYPE4)答案:A解析:[单选题]67.AlocalroutershowsanEBGPneighborintheActivestate.Whichstatementistrueaboutthelocalrouter?A)ThelocalrouterisattemptingtoopenaTCPsessionwiththeneighboringrouter.B)ThelocalrouterisreceivingprefixesfromtheneighboringrouterandaddingtheminRIB-IN.C)Thelocalrouterhasactiveprefixesintheforwardingtablefromtheneighboringrouter.D)ThelocalrouterhasBGPpassivemodeconfiguredfortheneighboringrouter.答案:A解析:[单选题]68.Whichdevicemakesthedecisionforawirelessclienttoroam?A)wirelessclientB)accesspointC)wirelessLANcontrollerD)WCSlocationserver答案:A解析:[单选题]69.Whatiscalculatedusingthenumericalvaluesofthetransmitterpowerlevel,cablelossandantennagain?A)SNRB)RSSIC)dBiD)EIRP答案:D解析:[单选题]70.WhichWANtopologyprovidesacombinationofsimplicityquality,andavailability?A)PartialmeshB)FullmeshC)Point-to-pointD)Hub-and-spoke答案:C解析:[单选题]71.Whendoesastackmasterloseitsrole?A)WhenthepriorityvalueofastackmemberischangedtoahighervalueB)WhenaswitchwithahigherpriorityisaddedtothestackC)WhenthestackmasterisresetD)Whenastackmemberfails答案:C解析:[单选题]72.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]73.Whcihresultdoesthepythoncodeachieve?A)ThecodeconvertstimetotheEpochLINUXtimeformat.B)Thecodeconvertstimetothe?year/month/day?timeformat.C)Thecodeconvertstimetotheyyyymmddrepresentation.D)Thecodeencryptsabase64decryptedpassword.答案:C解析:[单选题]74.WhatIstheprocessformovingavirtualmachinefromonehostmachinetoanotherwithnodowntime?A)HighavailabilityB)DisasterrecoveryC)livemigrationD)Multisitereplication答案:C解析:[单选题]75.WhatmakesCiscoDNACenterdifferentfromtraditionalnetworkmanagementapplicationsandtheirmanagementofnetworks?A)Itonlysupportsauto-discoveryofnetworkelementsinagreenfielddeployment.B)ItmodulardesignallowssomeonetoimplementdifferentversionstomeetthespecificneedsofanorganizationC)ItabstractspolicyfromtheactualdeviceconfigurationD)Itdoesnotsupporthighavailabilityofmanagementfunctionswhenoperatinginclustermode答案:C解析:[单选题]76.whichextendedpingIPheaderoptionallowsyoutospecifyoneormorehopsoverwhichthepacketswilltravelwithoutspecifyingthefullpath?A)VERBOSEB)LOOSEC)STRICTD)RECORD答案:B解析:[单选题]77.WhichoptiondescribestheeffectofthecommandiproutevrfDMZglobal?A)Itcreatesastaticrouteintheglobalroutingtablefor,andthenexthopisintheVRFDMZ.B)Itcreatesastaticrouteintheglobalroutingtableforandthenexthopisintheglobalroutingtable.C)ItcreatesastaticdefaultrouteintheVRFDMZ;andthenexthopisintheglobalroutingtable.D)ItcreatesastaticrouteintheVRPDMZfor,andthenexthopisintheVRFDMZ.E)ItcreatesastaticrouteintheYRFDMZfor,andthenexthopisintheglobalroutingtable.答案:E解析:[单选题]78.configurationlineinDMVPNdeployment?A)ITALLOWSTHESPOKEROUTERSTOCHANGETHENEXTHOPVALUEWHENSENDINGEIGRPUPDATESTOTHEHUBROUTER.B)ITENABLESEIGRPTODYNAMICALLYASSIGNTHENEXTHOPVALUEBASEDONTHEEIGRPDATABASE.C)ITPRESERVESTHEORIGINALNEXTHOPVALUEASLEARNEDBYTHESPOKEROUTERS.D)ITPRESERVESTHEORIGINALNEXTHOPVALUEASLEARNEDBYTHEHUBROUTERS.E)ITALLOWSTHESPOKEROUTERSTOCHANGETHENEXTHOPVALUEWHENSENDINGEIGRPUPDATESTOTHESPOKEROUTER.答案:C解析:[单选题]79.whichauthenticationtypesdoesOSPFsupport?A)MD5ANDCLEARTEXTB)CLEARTEXTONLYC)MILL(ORNOAUTHENTICATION),CLEARTEXT,ANDMD5D)MD5ONLYE)NULL(ORNOAUTHENTICATION)ANDCLEARTEXT.答案:C解析:[单选题]80.WhichtrunkingconfigurationbetweentwoCiscoswitchescancauseasecurityrisk?A)CONFIGURINGDIFFERENTNATIVEVLANSONTHESWITCHESB)CONFIGURINGDIFFERENTTRUNKMODESONTHESWITCHESC)CONFIGURINGMISMATCHEDVLANSONTHETRUNKD)DISABLINGDTPONTHETRUNKPORTSE)CONFIGURINGINCORRECTCHANNEL-GROUPSONTHESWITCHES答案:A解析:[单选题]81.WhichcommandcanyouentertodisableloggingforVTYlines?A)nologgingmonitorB)nologgingcountC)nologgingbufferD)nologgingconsoleE)nologgingtrap答案:A解析:[单选题]82.WhichtunnelingmechanismembedsanIPv4addresswithinanIPv6address?A)TeredoB)6to4C)4to6D)GREE)ISATAP答案:B解析:哪种隧道机制将IPv4地址嵌入到IPv6地址中?B6to4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.WhichtwoimprovementsdoSIA-QueryandSIA-ReplymessagesaddtoEIGRP?(Choosetwo.)A)STUCK-IN-ACTIVECONDITIONSARESOLVEDFASTER.B)THEYPREVENTAROUTEFROMGOINGINTOTHESTUCK-IN-ACTIVESTATE,C)THEYHELPINTHELOCALIZATIONOFTHEREALFAILUREINTHENETWORK.D)THEEIGRPADJACENCYBETWEENTWONEIGHBORSNEVERGOESDOWN.答案:AC解析:[多选题]84.Refertoexhibit.WhataretworeasonsforIPSLAtrackingfailure?(Choosetwo)A)Thesource-interfaceisconfiguredincorrectlyB)Thedestinationmustbeforicmp-echoC)AroutebacktotheR1LANnetworkismissinginR2D)ThedefaultroutehaswrongnexthopIPaddressE)Thethresholdvalueiswrong答案:AC解析:[多选题]85.WhenimplementingarouterasaDHCPserver,whichtwofeaturesmustbeconfigured'?(Choosetwo)A)relayagentinformationB)databaseagentC)addresspoolD)smart-relayE)manualbindings答案:CE解析:[多选题]86.AnetworkengineerisconfiguringOSPFonarouter.TheengineerwantstopreventhavingaRouteto/16learnedviaOSPF.IntheroutingtableandconfiguresaprefixlistUsingthecommandipprefix-listOFFICEseq5deny/16.WhichtwoidenticalConfigurationcommandsmustbeappliedtoaccomplishthegoal?(Choosetwo)A)distribute-listprefixOFFICEinundertheOSPFprocessB)ipprefix-listOFFICEseq10permit/0le32C)ipprefix-listOFFICEseq10permit/0ge32D)distribute-listOFFICEoutundertheOSPFprocessE)distribute-listOFFICEinundertheOSPFprocess答案:AB解析:[多选题]87.refertotheexhibit.Whichtwooptionsaretwobenefitsofthisconfiguration?(choosetwo)A)INCREASEDSECURITYB)REDUNDANCYC)REDUCEDJITTERD)REDUCEDLATENCYE)LOADSHARING答案:BE解析:[多选题]88.WhataretwodevicerolesinCiscoSD-Accessfabric?(Choosetwo)A)coreswitchB)vBondcontrollerC)edgenodeD)accessswitchE)bordernode答案:CE解析:[多选题]89.AframethatentersaswitchfailstheFrameCheckSequence.Whichtwointerfacecountersareincremented?(Choosetwo)A)runtsB)giantsC)frameD)CRCE)inputerrors答案:DE解析:[多选题]90.Whichtwostatementsaboutstaticroutingaretrue?(Choosetwo)A)ITISHIGHLYSCALABLEASNETWORKSGROW.B)ITREQUIRESLESSBANDWIDTHANDFEWERCPUCYCLESTHANDYNAMICROUTINGPROTOCOLS.