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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2)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.HowdoTCPandUDPdifferinthewaytheyprovidereliabilityfordeliveryofpackets?A)TCPdoesnotguaranteedeliveryorerrorcheckingtoensurethatthereisnocorruptionofdata;UDPprovidesmessageacknowledgementandretransmitsDataiflost.B)TCPprovidesflowcontroltoavoidoverwhelmingareceiverbysendingtoomanypacketsatonce;UDPsendspacketstothereceiverinacontinuousstreamWithoutcheckingforsequencing.C)TCPuseswindowingtodeliverpacketsreliably;UDPprovidesreliablemessagetransferbetweenhostsbyestablishingathree-wayhandshakeD)TCPisaconnectionlessprotocolthatdoesnotprovidereliabledeliveryofdata;UDPisaconnection-orientedprotocolthatusessequencingtoprovidereliableDelivery.答案:B解析:[单选题]2.Refertotheexhibit.AnengineerisusingXMLinanapplicationtosendinformationtoaRESTCONF-enabledevice.Aftersendingtherequest,theengineergetsthisResponsemessageandaHTTPresponsecodeof400.whatdotheseresponsestelltheengineer?A)TheAcceptheadersentwasapplication/xmlB)POSTwasusedinsteadofPUTtoupdateC)TheContent-Typeheadersentwasapplication/xmlD)AJSONbodywasused答案:A解析:[单选题]3.DWhichmechanismdocsgetvpnusetopreserveipheaderinformation?A)GREB)MPLSC)IPSECTRANSPORTMODED)IPSECTUNNELMODE答案:D解析:[单选题]4.Whichmarkingfieldisusedonlyasaninternalmarkingwithinarouter?A)QOSGroupB)DiscardEligiblityC)IPPrecedenceD)MPLSExperimental答案:A解析:[单选题]5.AcorporateofficeusesfourfloorsinabuildingFloor1has24usersFloor2has29usersFloor3has28usersFloor4has22usersWhichsubnetsummarizesandgivesthemostefficientdistributionofIPaddressesfortherouterconfiguration?A)/26assummaryand/29foreachfloorB)/24assummaryand/28foreachfloorC)/23assummaryand/25foreachfloorD)/25assummaryand/27foreachfloor答案:D解析:划分子网数②子网位数③子网掩码(二进制)④子网掩码(十进制)⑤每个子网主机数①1~2②1③11111111.11111111.11111111.10000000(/25)④28⑤126①3~4②2③11111111.11111111.11111111.11000000(/26)④92⑤62①5~8②3③11111111.11111111.11111111.11100000(/27)④24⑤3032-27=52的5次方-2=30个主机数①9~16②4③11111111.11111111.11111111.11110000(/28)④40⑤14[单选题]6.Whichinteriorgatewayprotocolisbasedonopenstandardsusesashortest-pathfirstalgorithm.providesnativeprotocols,andoperatesatthedatalinklayer?A)IS-ISB)EIGRPC)BGPD)OSPF答案:A解析:[单选题]7.WhatSNMPmessagealertsthemanagertoaconditiononthenetwork?A)trapB)getC)responseD)capture答案:A解析:什么SNMP消息警告管理器网络上的某个条件?A陷阱[单选题]8.WhenaWLANwithWPA2PSKisconfiguredintheWirelessLANControllerGUI.whichformatissupported?A)UnicodeB)base64C)decimalD)ASCII答案:D解析:[单选题]9.ANengineerisimplementingaroutemaptosupportredistributionwithinBGP.TheroutemapmustConfiguredtopermitallunmatchedroutes.Whichactionmusttheengineerperformtocompletethistask?A)IncludeapermitstatementasthefirstentryB)IncludeatleastoneexplicitdenystatementC)RemovetheimplicitdenyentryD)Includeapermitstatementasthelastentry答案:D解析:[单选题]10.IfOSPFisrunningonthisnetwork,howdoesRouter2handletrafficfromSiteBto10.10.13/25atSiteA?class="fr-ficfr-dibcursor-hover"A)ItsendspacketsoutofinterfaceFa0/2onlyB)<li>ItsendspacketsoutofinterfaceFa0/1only.</li>C)<li>Itcannotsendpacketsto10.10.13128/25</li>D)<li>Itload-balancestrafficoutofFa0/1andFa0/2</li>答案:C解析:Router2doesnothaveanentryforthesubnet28/25.Itonlyhasanentryfor/25,whichrangesfromto27.[单选题]11.YouhaveconfiguredarouterwithanOSPFrouterID,butitsIPaddressstillreflectsthephysicalinterface.Whichactioncanyoutaketocorrecttheproblemintheleastdisruptiveway?A)ReloadtheOSPFprocessB)SpecifyaloopbackaddressC)Reboottherouter.D)Savetherouterconfiguration答案:B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?b.指定环回地址[单选题]12.HowdoEIGRPmetricscomparetoOSPFmetrics?A)TheEIGRPadministrativedistanceforexternalroutesis170,andtheOSPFAdministrativedistanceforexternalroutesis110B)EIGRPusestheDijkstraalgorithm,andOSPFusesTheDUALalgorithmC)TheEIGRPadministrativedistanceforexternalroutesis170,andtheOSPFAdministrativedistanceforexternalroutesisundefinedD)EIGRPmetricsarebasedonacombinationofbandwidthandpacketloss,andOSPFMetricsarebasedoninterfacebandwidth答案:A解析:[单选题]13.WhichalgorithmsareusedtosecureRESTAPIfrombruteattacksandminimizetheimpact?A)SHA-512andSHA-384B)MD5algorithm-128andSHA-384C)SHA-1,SHA-256,andSHA-512D)PBKDF2,BCrypt,andSCrypt答案:D解析:[单选题]14.Ifconfiguringastaticdefaultrouteontherouterwiththeiproute120commandhowdoestherouterrespond?class="fr-ficfr-dibcursor-hover"A)ItignoresthenewstaticrouteuntiltheexistingOSPFdefaultrouteisremovedB)ItimmediatelyreplacestheexistingOSPFrouteintheroutingtablewiththenewlyconfiguredstaticrouteC)Itstartsload-balancingtrafficbetweenthetwodefaultroutesD)ItstartssendingtrafficwithoutaspecificmatchingentryintheroutingtabletoGigabitEthernet0/1答案:A解析:[单选题]15.whichwaytoinfluencepathselectionwithEIGRPispreferred?A)CHANGINGTHEBANDWIDTH,BECAUSETHATISWHATCISCORECOMMENDSB)CHANGINGTHEBANDWIDTH,BECAUSETHATISWHATCISCORECOMMENDSC)CHANGINGTHEBANDWIDTH,BECAUSEITMUSTBEDONEONLYONONEINTERFACEALONGTHEPATHD)CHANGINGTHEDELAY,EVENIFITMUSTBEDONEONMULTIPLEINTERFACES答案:D解析:[单选题]16.WithwhichprotocolisCoAPdesignedtobeused?A)TCPB)UDPC)XMPPD)SNMP答案:B解析:[单选题]17.Avideo-on-demandserver.WhichactionmusttheengineerperformtoconfigureextendeddiscoverytoSupporttheMPLSLDPsessionbetweentheheadendandtailendrouters?A)ConfiguretheinterfacebandwidthtohandleTCPandUDPtrafficbetweentheLDPpeersB)ConfigureaCiscoMPLSTEtunnelonbothendsofthesessionC)ConfigureanaccesslistontheinterfacetopermitTCPandUDPtrafficD)Configureatargetedneighborsession.答案:B解析:MPLSTE[单选题]18.Anengineermustprotecttheircompanyagainstransomwareattacks.Whichsolutionallowstheengineertoblocktheexecutionstageandpreventfileencryption?A)UseCiscoAMPdeploymentwiththeMaliciousActivityProtectionengineerenabledB)UseCiscoAMPdeploymentwiththeExploitPreventionengineenabledC)UseCiscoFirepowerandblocktraffictoTORnetworksD)UseCiscoFirepowerwithIntrusionPolicyandsnortrulesblockingSMBexploitation答案:A解析:[单选题]19.WhereinCiscoDNACenterisdocumentationofeachAPIcall,organizedbyitsfunctionalarea?A)RuntimeDashboardB)platformbundlesC)platformmanagementD)DeveloperToolkit答案:D解析:[单选题]20.WhichdeploymentoptionofCiscoNGFWprovidesscalability?A)tapB)clusteringC)inlinetapD)highavailability答案:B解析:[单选题]21.RouterR1Fa0/0cannotpingrouterR3Fa0/1.WhichactionmustbetakeninrouterR1tohelpresolvetheconfigurationissue?class="fr-ficfr-dibcursor-hover"A)setthedefaultnetworkas/24B)setthedefaultgatewayasC)configureastaticroutewithFa0/1astheegressinterfacetoreachthe/24networkD)<li>configureastaticroutewithasthenexthoptoreachthe/24network</li>答案:D解析:[单选题]22.Whicheffetedoestheaaanew-modelconigurationcommandhave?A)ItenablesAAAservicesonthedeviceB)ItconfiguresthedevicetoconnecttoaRADIUSserverforAAAC)ItassociatesaRADIUSservertoanAAAgroup.D)Itconfiguresalocaluseronthedevice.答案:A解析:aaa新型号的配置命令有哪些作用?A它支持设备上的AAA服务[单选题]23.HowarctheCiscoExpressForwardingtableandtheFIBrelatedtoeachother?A)THEFIBISUSEDTOPOPULATETHECISCOEXPRESSFORWARDINGTABLE.B)THECISCOEXPRESSFORWARDINGTABLEALLOWSROUTELOOKUPSTOBEFORWARDEDTOTHEROUTEPROCESSORFORPROCESSINGBEFORETHEYAREC)THERECANBEONLYONEFIBBUTMULTIPLECISCOEXPRESSFORWARDINGTABLESONIOSDEVICES.D)CISCOEXPRESSFORWARDINGUSESAFIBTOMAKEIPDESTINATIONPREFIX-BASEDSWITCHINGDECISIONS.答案:D解析:[单选题]24.howdoesailipv6hostautomaticallygenerateaglobaladdress?A)ITPREPENDSITSINTERFACEIDENTIFIERTOTHENETWORKPREFIXESCONTAINEDINROUTERADVERTISEMENTMESSAGES.B)ITAPPENDSITSINTERFACEIDENTIFIERTOTHENETWORKPREFIXESCONTAINEDINROUTERADVERTISEMENTMESSAGES.C)ITAPPENDSITSINTERFACEIDENTIFIERTOTHENETWORKPREFIXESCONTAINEDINROUTERSOLICITATIONMESSAGES,D)ITPREPENDSITSINTERFACEIDENTIFIERTOTHENETWORKPREFIXESCONTAINEDINROUTERSOLICITATIONMESSAGES答案:B解析:[单选题]25.refertotheexhibit,whichstatementistrue?A)BFD,SPFANDLSATIMERSARETUNEDFORFASTERCONVERGENCEB)FASTCONVERGENCEISNOTCONFIGUREDC)BFDANDSPFTHROTTLINGARECONFIGUREDD)ONLYBFDISENABLED答案:A解析:[单选题]26.WhichoptionsistheimplicitaccessruleforIPV6ACLs?A)PERMITALLB)PERMITNEIGHBORDISCOVERY,DENYEVERYTHINGELSEC)DENYALLD)PERMITALLICMP,DENYEVERYTHINGELSE答案:B解析:[单选题]27.WhichdatamodelinglanguageiscommonlyusedbyNETCONF?A)HTMLB)XMLC)YANGD)REST答案:C解析:[单选题]28.Bydefault,whichvirtualMACaddressdoesHSRPgroup16use?A)c0:41:43:64:13:10B)00:00:0c:07:ac:10C)05:00:0c:07:ac:16D)00:05:5c:07:0c:16答案:B解析:[单选题]29.WhichexhibitdisplaysavalidJSONfile?A){?hostname?:?edge_router_1??interfaces?:{?GigabitEthernet1/1??GigabitEthernet1/2??GigabitEthernet1/3?}}B){?hostname?:?edge_router_1??interfaces?:{?GigabitEthernet1/1?,?GigabitEthernet1/2?,?GigabitEthernet1/3?,},}C){?hostname?:?edge_router_1??interfaces?:[?GigabitEthernet1/1??GigabitEthernet1/2??GigabitEthernet1/3?]}D){?hostname?:?edge_router_1?,?interfaces?:[?GigabitEthernet1/1?,?GigabitEthernet1/2?,?GigabitEthernet1/3?]}答案:D解析:[单选题]30.InaDMVPNsolutionwhichcomponentcantheGREtumidsourceanddestinationgenerateautomatically?A)PRE-SHAREDKEYSB)CRYPTOACLSC)QOSMARKINGSD)POLICYMAPS答案:B解析:[单选题]31.WhichmetricvectorsarcstoredbutarenotusedbydefaultinEIGRP?A)RELIABILITYANDDELAYB)BANDWIDTHANDDELAYC)LOADANDRELIABILITYD)LOADANDBANDWIDTH答案:C解析:[单选题]32.Howdostratumlevelsrelatetothedistancefromatimesource?A)Stratum1devicesareconriecteddirectlytoanauthoritativetimesourceB)Stratum15devicesareconnecteddirectlyto已nauthoritativetimesourceC)Stratum15devicesareanauthoritativetimesourceD)Stratum0devicesareconnecteddirectlytoanauthoritativetimesource答案:A解析:[单选题]33.sw2(config)#track1000interfacegigabitEthernet0/0line-protocolSw2(config-track)#exitSw2(config)#interfacevlan1000SW2(confia-if)#ipaddressRefertotheexhibitAnengineermustconfgureHSRPforVLAN1000onSW2.TheSecondaryswitchmustimmediatelytakeovertheroleofactiverouteriftheinterlinkwithTheprimaryswitchfails.Whichcommandsetcompletesthistask?A)sw2(config-if)#standbyversion2Sw2(config-if)#standby1000ipSw2(config-if)#standby1000priority95Sw2(config-if)#standby1000track1000B)sw2(config-if)#standby1000ipSw2(config-if)#standby1000priority95Sw2(config-if)#standby1000preemptSw2(config-if)#standby1000track1000C)sw2(config-if)#standbyversion2Sw2(config-if)#standby1000ipSw2(config-if)#standby1000priority95Sw2(config-if)#standby1000preemptSw2(config-if)#standby1000track1000D)sw2(config-if)#standbyversion2Sw2(config-if)#standby1000ipSw2(config-if)#standby1000priority95Sw2(config-if)#standby1000preemptSw2(config-if)#standby1000trackgigabitEthernet0/0答案:C解析:[单选题]34.WhichNGFWmodeblockflowscrossingthefirewall?A)PassiveB)TapC)InlinetapD)Inline答案:D解析:[单选题]35.WhichnetworkdevicessecureAPIplatform?A)next-generationintrusiondetectionsystemsB)Layer3transitnetworkdevicesC)contentswitchesD)webapplicationfirewalls答案:D解析:web应用程序防火墙[单选题]36.WheredoesaswitchmaintainDHCPsnoopinginformation?A)intheMACaddresstableB)intheCAMtableC)intheDHCPbindingdatabaseD)intheVLANdatabase答案:C解析:交换机在哪里维护DHCP监视信息?C在DHCP绑定数据库中[单选题]37.AcompanyhasanexistingCisco5520HAclusterusingSSO.AnengineerdeploysanewsingleCiscoCatalyst9800WLCtotestnewfeatures.Theengineersuccessfullyconfiguresamobilitytunnelbetweenthe5520clusterand9800WLC.ClientsconnectedtothecorporateWLANroamseamlesslybetweenaccesspointsonthe5520and9800WLC.Afterafailureontheprimary5520WLC,allWLANservicesremainfunctional;howeverclientscannotroambetweenthe5520and9800controllerswithoutdroppingtheirconnection.Whichfeaturemustbeconfiguredtoremedytheissue?A)mobilityMAConthe5520clusterB)mobilityMAConthe9800WLCC)newmobilityonthe5520clusterD)newmobilityonthe9800WLC答案:B解析:[单选题]38.Inathree-tierhierarchicalcampusnetworkdesign,whichactionisadesignbest-practiceforthecorelayer?A)ProvideQoSprioritizationservicessuchasmarking,queueing,andclassificationforcriticalnetworktraffic.B)ProvideredundantLayer3point-to-pointlinksbetweenthecoredevicesformorepredictableandfasterconvergenceC)Provideadvancednetworksecurityfeaturessuchas802.1X.DHCPsnooping,VACLs,andportsecurityD)Provideredundantaggregationforaccesslayerdevicesandfirst-hopredundancyprotocolssuchasVRRP答案:B解析:[单选题]39.HowdoAAAoperationscompareregardinguseridentification,userservicesandaccesscontrol?A)AuthorizationprovidesaccesscontrolandauthenticationtracksuserservicesB)AuthenticationidentifiesusersandaccountingtracksuserservicesC)Accountingtracksuserservices,andauthenticationprovidesaccesscontrolD)Authorizationidentifiesusersandauthenticationprovidesaccesscontrol答案:B解析:[单选题]40.WhatistheinitialBFDstate?A)DownB)InitC)UPD)AdminDown答案:A解析:[单选题]41.WhereisradioresourcemanagementperformedinaCiscoSD-accesswirelesssolution?A)controlplanenodeB)DNACenterC)CiscoCMXD)wirelesscontroller答案:D解析:[单选题]42.IfaVRRPmasterrouterfails,whichrouterisselectedasthenewmasterrouter?A)routerwiththehighestpriorityB)routerwiththehighestloopbackaddressC)routerwiththelowestloopbackaddressD)routerwiththelowestpriority答案:A解析:[单选题]43.Whichnetworkactionoccurswithinthedataplane?A)comparethedestinationIPaddresstotheIProutingtable.B)runroutingprotocols(OSPF,EIGRP,RIP,BGP)C)makeaconfigurationchangefromanincomingNETCONFRPCD)replytoanincomingICMPechorequest答案:A解析:[单选题]44.WhichconfigurationrestrictstheamountofSSHthatarouteracceptsto100kbps?A)class-mapmatch-allCoPP_SSHMatchaccess-groupnameCoPP_SSH!Policy-mapCoPP_SSHclassCoPP_SSHPolicecir100000exceed-actiondrop!!!InterfaceGigabitEthernet0/1ipaddress25ipaccess-groupCoPP_SSHoutduplexautoSpeedautomedia-typerj45Service-policyinputCoPP_SSH!Ipaccess-listextendedCoPP_SSHPermittcpanyanyeq22!B)class-mapmatch-allCoPP_SSHMatchaccess-groupnameCoPP_SSH!Policy-mapCoPP_SSHclassCoPP_SSHpolicecirCoPP_SSHexceed-actiondrop!InterfaceGigabitEthernet0/1Ipaddress25ipaccess-group…outDuplexautospeedautomedia-typerj45Service-policyinputCoPP_SSH!Ipaccess-listextendedCoPP_SSHDenytcpanyanyeq22!C)class-mapmatch-allCoPP_SSHMatchaccess-groupnameCoPP_SSH!Policy-mapCoPP_SSHClassCoPP_SSHpolicecir100000exceed-actiondrop!Control-planeService-policyinputCoPP_SSH!Ipaccess-listextendedCoPP_SSHDenytcpanyanyeq22!D)class-mapmatch-allCoPP_SSHMatchaccess-groupnameCoPP_SSH!Policy-mapCoPP_SSHclassCoPP_SSHPolicecir100000exceed-actiondrop!Control-planetransitService-policyinputCoPP_SSH!Ipaccess-listextendedCoPP_SSHPermittcpanyanyeq22!答案:C解析:[单选题]45.WhichIS-ISprocessisresponsibleforfloodinglocallinkinformationtoadjacentrouters?A)DECISIONB)RECEIVEC)FORWARDD)UPDATE答案:D解析:[单选题]46.WhichPAgPmodecombinationpreventsanEtherchannelfromforming?A)auto/autoB)desirable/desirableC)auto/desirableD)desirable答案:A解析:[单选题]47.AserverrunningLinuxisprovidingsupportforvirtualmachinesalongwithDNSandDHCPservicesforasmallbusiness.Whichtechnologydoesthisrepresent?A)containerB)Type1hypervisorC)hardwarepass-throughD)Type2hypervisor答案:D解析:[单选题]48.IfyouchangetheweightanddistanceparametersonadevicewithanestablshedBGPneighbor,whichadditionaltaskmustyouperfomtoallowthetwodevicestocontinueexchangingroutes?A)ResettheBGPconnectionsonthedeviceB)ResetthegatewayinterfaceC)CleartheIProutesonthedeviceD)Changetheweightanddistancesettingsontheotherdevicetomatch答案:C解析:如果您在具有已建立的BGP邻居的设备上更改重量和距离参数,则必须执行附加任务才能允许两个设备继续交换路由?清除设备上的IP路由[单选题]49.HowisLayer3roamingaccomplishedinaunifiedwirelessdeployment?A)AnEoIPtunneliscreatedbetweentheclientandtheanchorcontrollertoprovideseamlessConnectivityastheclientisassociatedwiththenewAPB)ThecliententryontheoriginalcontrollerispassedtothedatabaseonthenewcontrollerC)ThenewcontrollerassignsanIPaddressfromthenewsubnettotheclientD)Theclientdatabaseontheoriginalcontrollerisupdatedtheanchorentry,andthenewControllerdatabaseisupdatedwiththeforeignentry.答案:D解析:[单选题]50.Acompanyplanstoimplementintent-basednetworkinginitscampusinfrastructure.Whichdesignfacilitiesamigratefromatraditionalcampusdesigntoaprogrammerfabricdesigner?A)Layer2accessB)three-tierC)two-tierD)routedaccess答案:D解析:[单选题]51.WhichprotocolisusedtoencryptcontrolplanetrafficbetweenSD-WANcontrollersandSD-WANendpoints?A)DTLSB)IPsecC)PGPD)HTTPS答案:A解析:[单选题]52.WhichMACprotocolsetsarandomtimertoreattemptcommunication?A)RARPB)CSMA/CAC)CSMA/CDD)IEEE802.1x答案:C解析:哪个MAC协议设置了一个随机计时器来重新尝试通信?CCSMA/CD[单选题]53.HowdotheRIBandtheFIBdiffer?A)RIBcontainstheinterfaceforadestination,andtheFIBcontainsthenexthopinformationB)FIBcontainsrouteslearnedthroughadynamicroutingprotocol,andtheRIBcontainsroutesthatarestaticordirectlyconnectedC)RIBisderivedfromthecontrolplane,andtheFIBisderivedfromtheRIBD)FIBisderivedfromthecontrolplane,andtheRIBisderivedfromthedataplane答案:C解析:[单选题]54.InanSD-WANdeployment,whichactioninthevSmartcontrollerresponsiblefor?A)handle,maintain,andgatherconfigurationandstatusfornodeswithintheSD-WANfabricB)onboardvEdgenodesintotheSD-WANfabricC)gathertelemetrydatafromvEdgeroutersD)distributepoliciesthatgoverndataforwardingperformedwithintheSD-WANfabric答案:D解析:[单选题]55.Howdoagent-basedversusagentlessconfigurationmanagementtoolscompare?A)Agent-basedtoolsdonotrequireahigh-levellanguageinterpretersuchasPythonorRubyonslavenodesB)Agentlesstoolsrequirenomessagingsystemsbet-veenmasterandslaves.C)Agent-basedtoolsdonotrequireinstaltationofadditionalsoftwarepackagesontheslavenodesD)Agentlesstoolsuseproxynodestointerfacewithslavenodes答案:A解析:[单选题]56.Whichunitmeasuresthepowerofaradiosignalwithreferenceto1milliwatt?A)dBwB)dBiC)mWD)dBm答案:D解析:[单选题]57.Whichsymptomcancauseduplexmismatchproblem?A)noearnerB)collisionsoninterfaceC)giantsD)CRCerrors答案:B解析:哪些症状会导致双工不匹配问题?B接口上的碰撞[单选题]58.WhichDNSlookupdoesanaccesspointperformwhenattemptingCAPWAPdiscovery?A)CISCO-CONTROLLER.localB)CAPWAP-CONTROLLER.localC)CISCO-CAPWAP-CONTROLLER.localD)CISCO-DNA-CONTROLLER.local答案:C解析:[单选题]59.WhichCiscoDNAcenterapplicationisresponsibleforgroup-basedaccesscontrolPermissions?A)DesignB)ProvisionC)AssuranceD)Policy答案:D解析:[单选题]60.Usingdirectsequencespreadspectrum,whichthree2.4-GHzchannelsareusedtolimitcollisions?A)1,6,11B)1,5,10C)1,2,3D)5,6,7答案:A解析:[单选题]61.WhichfunctiondoesafabricAPperforminaCiscoSD-Accessdeployment?A)Itmanageswirelessclients?membershipinformationinthefabricB)Itconnectswirelessclientstothefabric.C)Itupdateswirelessclients?locationsinthefabricD)Itconfiguressecuritypoliciesdowntowirelessclientsinthefabric答案:B解析:[单选题]62.WhatNTPstratumlevelisaserverthatisconnecteddirectlytoanauthoritativetimesource?A)Stratum0B)Stratum1C)Stratum14D)Stratum15答案:B解析:[单选题]63.whenyouimplementPFR,whichIPSLAprobeisusedtodeterminetheMOS?A)JITTERB)LATENCYC)PACKETLOSSD)THROUGHPUT答案:A解析:[单选题]64.Whichimplementationprovidesthestrongestencryptioncombinationforthewirelessenvironment?A)WPA2+AESB)WPA+AESC)WEPD)WPA+TKIP答案:A解析:[单选题]65.Adevicedetectstwostationstransmittingframesatthesametime.Thisconditionoccursafterthefirst64bytesoftheframeisreceivedinterfacecounterincrements?A)collisionB)CRCC)runtD)latecollision答案:D解析:[单选题]66.WhichoftheportisnotpartofSTPprotocol.A)ListeningB)LearningC)ForwardingD)Discarding答案:D解析:哪个端口不是STP协议的一部分。D丢弃[单选题]67.whichEIGRPfeatureallowstheuseofleakmaps?A)OFFSET-LISTB)NEIGHBORC)ADDRESS-FAMILYD)STUB答案:D解析:[单选题]68.WhichWPA3enhancementprotectsagainsthackersviewingtrafficontheWi-Finetwork?A)TKiPencryptionB)AESencryptionC)scrambledencryptionkeyD)SAEencryption答案:D解析:[单选题]69.WhichresultoccurswhenPortFastisenabledonaninterfacethatisconnectedtoanotherswitch?A)SpanningtreemayfailtodetectaswitchingloopinthenetworkthatcausesbroadcaststormsB)VTPisallowedtopropagateVLANconfigurationinformationfromswitchtoswitchautomatically.C)RootportchoiceandspanningtreerecalculationareacceleratedwhenaswitchlinkgoesdownD)AfterspanningtreeconvergesPortFastshutsdownanyportthatreceivesBPDUs.答案:A解析:[单选题]70.whichAPIuseHTTPmeddagestotansferdatatoapplicationsresidingondifferenthost?A)OpFlexB)RESTC)OpenStackD)OpenFlow答案:B解析:哪个API使用HTTPmeddages将数据传输到驻留在不同主机上的应用程序?B.休息[单选题]71.Whatbenefitdoescontroller-basednetworkingprovideversustraditionalnetworking?A)movesfromatwo-tiertoathree-tiernetworkarchitecturetoprovidemaximumredundancyB)providesanaddedlayerofsecuritytoprotectfromDDoSattacksC)allowsconfigurationandmonitoringofthenetworkfromonecentralizedportD)combinescontrolanddataplanefunctionalityonasingledevicetominimizelatency答案:C解析:[单选题]72.HOWDOESCISCOEXPRESSFORWARDINGSWITCHINGDIFFERFROMPROCESSSWITCHINGONCISCODEVICESA)CiscoexpressforwardingswitchingusesadjacencytablesbuiltbytheCDPprotocol,andprocessswitchingusestheroutingtable.B)CiscoexpressforwardingswitchingusesaproprietaryprotocolbasedonIS-ISforMACaddresslookup,andprocessswitchingusestheMACaddresstable.C)Ciscoexpressforwardingswitchingusesdedicatedhardwareprocessors,andprocessswitchingusesthemainprocessor.D)Ciscoexpressforwardingswitchingsavesmemorybystoringadjacencytablesindedicatedmemoryonthelinecards,andprocessswitchingstoresalltablesinthemainmemory.答案:C解析:[单选题]73.HowdotraditionalcampusdevicemanagementandCiscoDNACenterdevicemanagementdifferinregardstodeployment?A)CiscoDNACenterdevicemanagementcandeployanetworkmorequicklythantraditionalcampusdevicemanagementB)TraditionalcampusdevicemanagementallowsanetworktoscalemorequicklythanwithCiscoDNACenterdevicemanagementC)CiscoDNACenterdevicemanagementcanbeimplementedatalowercostthanmosttraditionalcampusdevicemanagementoptionsD)TraditionalcampusdevicemanagementschemescantypicallydeploypatchesandupdatesmorequicklythanCiscoDNACenterdevicemanagement答案:A解析:[单选题]74.whichcircumstanceisacommoncauseoflatecollisions?A)nativeVLANmismatchB)overloadedhardwarequeuesC)duplexmismatchD)softwaremisconfiguration答案:C解析:哪种情况是晚点碰撞的常见原因?c.双工不匹配[单选题]75.WhichHTTPstatuscodeisthecorrectresponseforarequestwithanincorrectpasswordappliedtoaRESTAPIsession?A)HTTPStatusCode:200B)HTTPStatusCode:302C)HTTPStatusCode:401D)HTTPStatusCode:504答案:C解析:[单选题]76.WhichdevicesdoesCiscoCenterconfigurewhendeployinganIP-basedaccesscontrolpolicy?A)AlldevicesintegratingwithISEB)selectedindividualdevicesC)alldevicesinselectedsitesD)allwireddevices答案:C解析:[单选题]77.HowistheMRUforamultilinkbundledetermined?A)ItisnegotiatedbyLCP.B)Itismanuallyconfiguredonthemultilinkbundle.C)Itismanuallyconfiguredonallphysicalinterfacesofamultilinkbundle.D)ItisnegotiatedbyNCP.E)ItisnegotiatedbyIPCP.答案:A解析:[单选题]78.whataretheminimumrequirementsforciscopfrtoprovideroutingcontrol?A)ONEMASTERCONTROLLER,TWOBORDERROUTERS,TWOINTERNALINTERFACES,ANDTWOEXTERNALINTERFACES.B)ONEMASTERCONTROLLER,ONEBORDERROUTER,ONEINTERNALINTERFACE,ANDTWOEXTERNALINTERFACES.C)ONEMASTERCONTROLLER,TWOBORDERROUTER,ONEINTERNALINTERFACE,ANDONEEXTERNALINTERFACE.D)ONEMASTERCONTROLLER,ONEBORDERROUTER,TWOINTERNALINTERFACES,ANDONEEXTERNALINTERFACE.E)TWOMASTERCONTROLLERS,ONEBORDERROUTER,ONEINTERNALINTERFACE,ANDONEEXTERNALINTERFACE.答案:B解析:[单选题]79.WhichtypeofACLcanbeappliedonlytoLayer2ports?A)PORTACLSB)REFLEXIVEACLSC)REFLEXIVEACLSD)DYNAMICACLSE)VLANACLS答案:A解析:[单选题]80.whichcommandcanyouentertodisableloggingforVTYlines?A)NOLOGGINGMONITORB)NOLOGGINGCOUNTC)NOLOGGINGBUFFERD)NOLOGGINGCONSOLEE)NOLOGGINGTRAP答案:A解析:[单选题]81.whichIGMPsnoopingfeaturetracksigmpv3hostsonaper-portbasis?A)IGMPV3QUERIERB)IGMPV3STATIC-GROUPC)FAST-LEAVED)EXPLICITTRACKINGE)MEMBERSHIPREPORT答案:A解析:[单选题]82.IfEIGRPandOSPFarcconfiguredwithinailadministrativedomainforthesamenetwork,whichvaluecanyouchangesothattheOSPFbecomestheinstalledroutingprotocolforallroutes?A)LOCALPREFERENCEB)METRICC)MEDD)ADMINISTRATIVEDISTANCEE)PREFIXLENGTH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.refertotheexhibit.Whataretwoeffectsofthegivenconfiguration.(choosetwo)A)THEROUTERWILLFAILTOFORMNEIGHBORADJACENCIESOVERALLEIGRPINTERFACEEXCEPTF0/0B)THEROUTERWILLFAILTOFORMNEIGHBORADJACENCIESOVERINTERFACEF0/0C)THEROUTERWILLMANUALLYSUMMARIZETHE/27NETWORKD)THEROUTERWILLINSTALLTHE/27NETWORKINTOITSEIGRPTOPOLOGYTABLE答案:BD解析:[多选题]84.whichtwostatementsaboutaflatsingle-hubDMVPNwithNHRParetrue?(choosetwo)A)NHRPDISABLESMULTICAST.B)THEHUBROUTERUSESNHRPTOINITIATETHEGRETUNNELWITHSPOKES.C)NHRPSHORTENSTHECONFIGURATIONOFTHEHUBROUTER.D)NHRPDYNAMICALLYPROVIDESINFORMATIONABOUTTHESPOKEROUTERSTOTHEHUB.E)THESPOKEROUTERSACTASTHENHRPSERVERS.答案:CD解析:[多选题]85.refertotheexhibit.IfR1andR2cannotestablishanOSPFneighborrelationship,whichtwocombinedactionsmustyoutaketoresolvetheproblem?(choosetwo)A)CONFIGURATIONPPPAUTHENTICATIONUNDERTHER2GIGABITETHERNET0/1INTERFACE.B)CHANGETHEIPLOCALPOOLCOMMANDONR2TOIPLOCALPOOLPOOL1.C)CONFIGURATIONR1TOSENDTHEPAPUSERNAMEANDPASSWORDONTHEDIALER1INTERFACE.D)CHANGETHEPPPAUTHENTICATIONTOCHAPAUTHENTICATION

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