ccna正版題庫v20加強(qiáng)版選擇題

QUESTIONRefertotheexhibit.WhatwillRouter1dowhenitreceivesthedataframeshown?(ChooseRouter1willstripoffthesourceMACaddressandreceitwiththeMACaddressRouter1willstripoffthesourceIPaddressandreceitwiththeIPaddressRouter1willstripoffthedestinationMACaddressandreceitwiththeMACaddressRouter1willstripoffthedestinationIPaddressandreceitwiththeIPaddressofRouter1willforwardthedatapacketoutinterfaceRouter1willforwardthedatapacketoutinterfaceCorrectAnswer:Section:OperationofIPDataNetwroks -攻城獅QUESTIONRefertotheexhibit.WhichthreestatementscorrectlydescribeNetworkDeviceA?(ChooseWithanetworkwidemaskof28,eachinterfacedoesnotrequireanIPWithanetworkwidemaskof28,eachinterfacedoesrequireanIPaddressonauniqueIPsubnet.Withanetworkwidemaskof,mustbeaLayer2deviceforthePCstocommunicatewitheachother.Withanetworkwidemaskof,mustbeaLayer3deviceforthePCstocommunicatewitheachother.Withanetworkwidemaskof,eachinterfacedoesnotrequireanIPCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONWhichlayerintheOSIreferencemodelisresponsiblefordeterminingtheavailabilityofthereceivingprogramandcheckingtoseeifenoughresourcesexistforthatcommunication?CorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONWhichofthefollowingdescribestherolesofdevicesinaWAN?(ChooseACSU/DSUterminatesadigitallocalAmodemterminatesadigitallocalACSU/DSUterminatesanoglocalAmodemterminates oglocalArouteriscommonlyconsideredaDTEArouteriscommonlyconsideredaDCECorrectAnswer:ADESection:WAN 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibit,HostAsinterfaceS0/0onrouter3,whatistheTTLvalueforthatCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONAnetworkadministratorisverifyingtheconfigurationofanewlyinstalledhostbyestablishinganFTPconnectiontoaremoteserver.Whatisthehighestlayeroftheprotocolstackthatthenetworkadministratorisusingforthisoperation?dataCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑:ht QUESTIONRefertotheexhibit.AfterHostAsHostB,whichentrywillbeintheARPcacheofHostAtosupportthisCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: 問：當(dāng)主機(jī)A主機(jī)B之后，下面那個(gè)ARP緩存條目會(huì)支持此次通訊考題分析：這道題考的是局域網(wǎng)ARP的請(qǐng)求。HostA要HostB，首先HostA需要封裝包，而封裝包需要HostA和HostB的二、三層地址的信息。然而HostA不知道HostB的二層地址，這樣HostA就會(huì)向局域網(wǎng)發(fā)送Arp請(qǐng)求，來請(qǐng)求HostB的二層地址。網(wǎng)關(guān)收到HostA的Arp請(qǐng)求后，發(fā)現(xiàn)HostB是其他網(wǎng)段的地址，這樣網(wǎng)關(guān)會(huì)啟用Arp的功能，將自己的二層地址應(yīng)答給HostA。HostA收到應(yīng)答包后會(huì)對(duì)本地的ARP緩存進(jìn)行更新，將應(yīng)答方的IP和MAC地址在ARP緩存中，同時(shí)完成包的封裝。網(wǎng)關(guān)在收到攻城獅QUESTIONAnetworkinterfaceporthascollisiondetectionandcarriersensingenabledonasharedtwistedpairnetwork.Fromthisstatement,whatisknownaboutthenetworkinterfaceport?Thisisa10Mb/sswitchThisisa100MbsswitchThisisanEthernetportoperatingathalfThisisanEthernetportoperatingatfullThisisaportonanetworkinterfacecardinaCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONAreceivinghostcomputesthechecksumonaframeanddeterminesthattheframeisdamaged.Theframeisthendiscarded.AtwhichOSIlayerdidthishappen?dataCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONWhichofthefollowingcorrectlydescribestepsintheOSIdataencapsulationprocess?(ChooseThetransportlayerdividesadatastreamintosegmentsandmayaddreliabilityandflowcontrolThedatalinklayeraddsphysicalsourceanddestinationaddressesandanFCStothePacketsarecreatedwhenthenetworklayerencapsulatesaframewithsourceanddestinationhostaddressesandprotocol-relatedcontrolinformation.PacketsarecreatedwhenthenetworklayeraddsLayer3addressesandcontrolinformationtoaThepresentationlayertranslatesbitsintovoltagesfortransmissionacrossthephysicalCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: 傳輸層將數(shù)據(jù)分段，并且加入flowcontrol等信息。在網(wǎng)絡(luò)層就將數(shù)據(jù)進(jìn)行打包，并加上ip包頭，鏈路層。將攻城獅QUESTIONRefertothegraphic.HostAiscommunicatingwiththeseiver.WhatwillbethesourceMACaddressoftheframesreceivedbyHostAfromtheserver?theMACaddressoftheservernetworktheMACaddressofhosttheMACaddressofrouterinterfaceetheMACaddressofrouterinterfaceCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑:ht hostA收到server的幀的源mac地址是hostA的網(wǎng)關(guān)的mac。QUESTIONRefertotheexhibit.WhattworesultswouldoccurifthehubweretoberecedwithaswitchthatisconfiguredwithoneEthernetVLAN?(choosetwo)Thenumberof swouldThenumberof swouldThenumberof swouldremaintheThenumberof swouldremaintheThenumberof swouldCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: hub不可以域，所有端口同一個(gè)域中，交換機(jī)可以域，每個(gè)端口在不同域中，故換換機(jī)域個(gè)數(shù)會(huì)增加，大小會(huì)減小，而hub交換機(jī)都不可廣播域所有端口都在同一個(gè)廣播CD域數(shù)量不QUESTIONWhichthreestatements ydescribelayer2Ethernetswitches?(chooseMicrosegmentationdecreasesthenumberofcollisionsontheifaswitchreceivesaframeforanunknowndestination,itusesARPtoresolvetheSpanningTreeProtocolallowsswitchestoautomaticallysharevlanInaproperlyfunctioningnetworkwithredundantswitchedpaths,eachswitchedaegmentwillcontainonerootbridgewithallitsportsintheforwardingstate.Allotherswitchesinthatbroadcast haveonlyonerootport.Establishingvlansincreasesthenumberof Switchesthatareconfiguredwithvlansmakeforwardingdecisionsbasedonbothlayer2andlayer3addressinformation.CorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONWheredoesroutingoccurwithintheDoDTCP/IPreferenceCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONWhichdestinationaddresseswillbeusedbyHostAtosenddatatoHostC?(ChoosetheIPaddressofSwitchtheMACaddressofSwitchtheIPaddressofHosttheMACaddressofHosttheIPaddressoftherouter'sE0theMACaddressoftherouter'sE0CorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONForwhattwopurposesdoestheEthernetprotocolusephysicaladdresses?(ChoosetouniquelyidentifydevicesatLayertoallowcommunicationwithdevicesonadifferenttodifferentiateaLayer2framefromaLayer3toestablishaprioritysystemtodeterminewhichdevicegetstotransmittoallowcommunicationbetweendifferentdevicesonthesametoallowdetectionofaremotedevicewhenitsphysicaladdressisCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: A：在二層唯一確定一臺(tái)設(shè)備，正 攻城獅QUESTIONRefertotheexhibit.Basedontheinformationgiven.WhichswitchwillbeelectedrootbridgeandSwitchA,becauseithasthelowestMACSwitchC,becauseithasthelowestSwitchB,becauseithasthehighestMACSwitchC,becauseitisthemostcentrallylocatedSwitchA,becauseitisthemostcentrallylocatedSwitchD,becauseithasthehighestCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhatvalueisprimarilyusedtodeterminewhichport estherootportoneachnonrootswitchinaspanning-treetopology?lowestportMACportprioritynumberandMACVTPrevisionhighestportprioritypathCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibit.Switch-1needstosenddatatoahostwithaMACaddressof00b0.d056.efa4.WhatwillSwitch-1dowiththisdata?switch-1willdropthedatabecauseitdoesnothaveanentryforthatMACswitch-1willfloodthedataoutallofitsportfromwhichthedataswitch-1willforwardthedatatoitsdefaultswitch-1willsendanARPrequestoutallitsportsexcepttheportfromwhichthedataCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 答案：B沒有macSwitch-1willdropthedatabecauseitdoesnothaveanentryforthatMACaddress.(Switch-1會(huì)丟棄該Switch-1willfloodthedataoutallofitsportsexcepttheportfromwhichthedataoriginated.(Switch-1會(huì)Switch-1willsendanARPrequestoutallitsportsexcepttheportfromwhichthedataoriginated.Switch-1willforwardthedatatoitsdefaultgateway.(Switch-1會(huì)往默認(rèn)網(wǎng)關(guān)發(fā)送該數(shù)據(jù)QUESTIONWhatisthefunctionofthecommandswitchporttrunknativevlan999onaItdesignatesVLAN999foruntaggedItblocksVLAN999trafficfrompassingontheItcreatesaVLAN999ItdesignatesVLAN999asthedefaultforallunknowntaggedCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhichtwoprotocolsareusedbybridgesand/orswitchestopreventloopsinalayer2network?(ChooseCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhichswitchwouldSTPchoose etherootbridgeintheselectionCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑:ht QUESTIONAswitchisconfiguredwithallportsassignedtovlan2withfullduplexFastEthernettosegmentexistingdepartmentaltraffic.WhatistheeffectofaddingswitchportstoanewVLANontheswitch?More swillbeIPaddressutilizationwillbemoreMorebandwidthwillberequiredthanwasneededAnadditional willbeCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: vlan有廣播域的作QUESTIONWhatarethreebenefitsofimplementingvlans?(chooseAmoreefficientuseofbandwidthcanbeachievedallowingmanyphysicalgroupstousethesamenetworkinfrastructureBroadcaststormscanbemitigatedbydecreasingthenumberofbroadcast s,thusincreasingtheirsize.Ahigherlevelofnetworksecuritycanbereachedbyseparatingsensitivedatatrafficfromothernetworktraffic.Port-basedvlansincreaseswitch-portuseefficient,thanksto802.1QAmoreefficientuseofbandwidthcanbeachievedallowingmanylogicalnetworkstousethesamenetworkinfrastructure.Broadcaststormscanbemitigatedbyincreasingthenumberofbroadcast s,thusreducingtheirVLANsmakeiteasierforITstafftoconfigurenewlogicalgroups,becausethevlansallbelongtothesamebroadcast CorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: Dthanksto802.1Qtrunks不正確E正確，logical是邏輯的意思攻城獅QUESTIONWhichIEEEstandardprotocolisinitiatedasaresultofsuccessfulDTPcompletioninaswitchoverCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 動(dòng)態(tài)中繼協(xié)議DTP，是VLAN組中思科的私有協(xié)議，主要用于協(xié)商兩臺(tái)設(shè)備間鏈的中繼過程及中繼封裝802.1Q類型。QUESTIONWhichofthefollowingarebenefitsofVLANs?(ChooseTheyincreasethesizeof TheyallowlogicalgrouofusersbyTheycanenhancenetworkTheyincreasethesizeof swhiledecreasingthenumberof Theyincreasethenumberof swhiledecreasingthesizeofthe TheysimplifyswitchCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 考查VLAN的特點(diǎn)A：增加域的大小，錯(cuò)誤B： 減少廣播域的大小時(shí)增加了廣播域個(gè)數(shù)。正確。F：攻城獅QUESTIONRefertotheexhibit.AtechnicianhasinstalledSwithchBandneedstoconfigureitforremoteaccessfromthemanagementworkstationconnectedSwitchAWhichsetofcommandsisrequiredto plishthisSwitchB(config)#interfaceFastEthernet0/1SwitchB(config)#ipaddress52SwitchB(config)#noshutdownSwitchB(config)#interfacevlan1SwitchB(config)#ipaddress52SwitchB(config)#noshutdownSwitchB(config)#interfacevlanSwitchB(config)#ipaddress52SwitchB(config)#interfacevlan1SwitchB(config)#ipaddress52SwitchB(config)#noshutdownCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: BQUESTIONInanEthernetnetwork,underwhattwoscenarioscandevicestransmit?(ChoosewhentheyreceiveaspecialwhenthereisawhentheydetectnootherdevicesarewhenthemediumiswhentheservergrantsCorrectAnswer:Section:OperationofIPData 更新/講解/免費(fèi)答疑: 攻城獅QUESTIONWhichtwostatesaretheportstateswhenRSTPhasconverged?(chooseCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhichtwocommandscanbeusedtoverifyatrunklinkconfigurationstatusonagivenciscoswitch?(choosetwo)showinterfacesshowinterfacesshowinterfacesshowipinterfaceshowinterfacesCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 查看trunk命令，showinterfacetrunk和showinterface，只能選QUESTIONWhichcommandenablesRSTPonaspanning-treemoderapid-spanning-treespanning-treespanning-treemodeCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 啟用RSTPQUESTIONWhichofthefollowingstatementsdescribethenetworkshowninthegraphic?(ChooseTherearetwo sintheTherearefour sintheTherearesix sintheTherearefour sintheTherearefive sintheThereareseven sintheCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheAllswitchportsareassignedtothecorrectVLANs,butnoneofthehostsconnectedtoSwitchAcancommunicatewithhostsinthesameVLANconnectedtoSwitchB.Basedontheoutputshown,whatisthemostlikelyproblem?TheaccesslinkneedstobeconfiguredinmultipleThelinkbetweentheswitchesisconfiguredinthewrongThelinkbetweentheswitchesneedstobeconfiguredasaVTPisnotconfiguredtocarryVLANinformationbetweentheSwitchIPaddressesmustbeconfiguredinorderfortraffictobeforwardedbetweentheCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibit.GiventheoutputshownfromthisCiscoCatalyst2950,whatisthemostlikelyreasonthatinterfaceFastEthernet0/10isnottherootportforVLAN2?ThisswitchhasmorethanoneinterfaceconnectedtotherootnetworksegmentinVLANThisswitchisrunningRSTPwhiletheelecteddesignatedswitchisrunning802.1dSpanningThisswitchinterfacehasahigherpathcosttotherootbridgethananotherintheThisswitchhasalowerbridgeIDforVLAN2thantheelecteddesignatedCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 攻城獅QUESTIONWhywillaswitchneverlearnabroadcastBroadcastframesareneversenttoBroadcastaddressesuseanincorrectformatfortheswitchingAbroadcastaddresswillneverbethesourceaddressofaBroadcastsonlyusenetworklayerAbroadcastframeisneverforwardedbyaCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibit.WhyhasthisswitchnotbeenelectedtherootbridgeforIthasmorethanoneinterfacethatisconnectedtotherootnetworkItisrunningRSTPwhiletheelectedrootbridgeisrunning802.1dspanningIthasahigherMACaddressthantheelectedrootIthasahigherbridgeIDthantheelectedrootCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: B：使用了RSTP，但是根橋時(shí)使用了802.1d，錯(cuò)誤 QUESTIONWhichtwolinkprotocolsareusedtocarrymultipleVLANsoverasinglelink?(ChooseCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONassumingthedefaultswitchconfigurationwhichvlanrangecanbeaddedmodifiedandremovedonaciscoswitch?2through1through1through2throughCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhichstatementaboutvlanoperationonciscocatalystswitchesiswhenapacketisreceivedfroman802.1Qtrunk,thevlanidcanbedeterminedfromthesourceMACaddresstable.unkownunicastframesareretransmittedonlytotheportsthatbelongtothesameportsbetweenswitchesshouldbeconfiguredinaccessmodesothatvlanscanspanacrossportsbroadcastandmulticastframesareretransmittedtoportsthatareconfiguredondifferentCorrectAnswer:Section:WAN 更新/講解/免費(fèi)答疑: Dvlan能分割廣播域，廣播不能跨vlanQUESTIONRefertothetopologyshownintheexhibit.WhichportswillbeSTPdesignatedportsifallthelinksareoperatingatthesamebandwidth?(Choosethree.)SwitchA-SwitchA-SwitchB-SwitchB-SwitchC-SwitchC-CorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibit.HowshouldtheFastEthernet0/1portonthe2950modelswitchesthatareshownintheexhibitbeconfiguredtoallowconnectivitybetweenalldevices?TheportsonlyneedtobeconnectedbyacrossoverSwitchX(config)#interfaceFastEthernet0/1SwitchX(config-if)#switchportmodetrunkSwitchX(config)#interfaceFastEthernet0/1SwitchX(config-if)#switchportmodeaccessSwitchX(config-if)#switchportaccessvlan1SwitchX(config)#interfaceFastEthernet0/1SwitchX(config-if)#switchportmodetrunkSwitchX(config-if)#switchporttrunkvlan1SwitchX(config-if)#switchporttrunkvlan10SwitchX(config-if)#switchporttrunkvlan20CorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibitAframeonvlan1onswitchs1issenttoswitchs2whentheframeisreceivedonvlan2,whatcausesthisbehavior?trunkmodevlansthatdonotcorrespondtoauniqueIPnativevlanallowingonlyvlan2ontheCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhichthreestatementsaboutRSTParetrue?(chooseRSTPsignificantlyreducestopologyreconvertingtimeafteralinkRSTPexpendstheSTPportrolesbyaddingthealternateandbackupRSTPalsousestheSTPproprsal-agreementRSTPusethesametimer-baseedprocessasSTPonpoint-to-pointRSTPprovidesafastertransitiontotheforwardingstateonpoint-to-pointlinksthanSTPCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONAtwhichlayeroftheOSImodelisRSTPusedtopreventdataCorrectAnswer:Section:OperationofIPDataNetwroks 更新/講解/免費(fèi)答疑: QUESTIONWhatdoesaLayer2switchusetodecidewheretoforwardareceivedsourceMACsourceIPsourceswitchdestinationIPdestinationportdestinationMACCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibit.WhichstatementisTheFa0/11roleconfirmsthatSwitchAistherootbridgeforVLANVLAN20isrunningthePerVLANSpanningTreeTheMACaddressoftherootbridgeisSwitchAisnottherootbridge,becausenotalloftheinterfacerolesareCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑:ht QUESTIONWhichtwobenefitsareprovidedbycreatingVLANs?(ChooseaddeddedicatedprovidesallowsswitchestoroutetrafficbetweencontainsCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhichcommandcanbeusedfromaPCtoverifytheconnectivitybetweenhoststhatconnectthroughaswitchinthesameLAN?addresstracerttraceroutearpCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONBasedonthenetworkshowninthegraphicwhichoptioncontainsthepotentialnetworkingproblemandprotocolorsettingthatcantopreventtheproblem?Routingloops,holddownSwitchingloops,splitRoutingloops,splitSwitchingloops,Routingloops,Switchingloops,CorrectAnswer:Section:LANSwitching QUESTIONRefertotheexhibit.WhichtwostatementsaretrueaboutinterVLANroutinginthetopologythatisshownintheexhibit?(Choosetwo.)HostEandhostFusethesameIPgatewayRouter1andSwitch2shouldbeconnectedviaacrossoverRouter1willnotyaroleincommunicationsbetweenhostAandhostTheFastEthernet0/0interfaceonRouter1mustbeconfiguredwithRouter1needsmoreLANinterfaces modatetheVLANsthatareshownintheTheFastEthernet0/0interfaceonRouter1andSwitch2trunkportsmustbeconfiguredusingthesameencapsulationtype.CorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 數(shù)據(jù)流量的轉(zhuǎn)發(fā)。如圖，Route1不需要的Lan接口，它只需要在F0/0口上創(chuàng)建的子接口來完成對(duì)攻城獅QUESTIONWhichtwoofthesearecharacteristicsofthe802.1Qprotocol?(chooseitisalayer2messagingprotocolwhichmaintainsvlanconfigurationsacrossitincludesan8-bitfieldwhichspecifiesthepriorityofaitisusedexclusivelyfortaggingvlanframesanddosenotaddressnetworkreconvergencefollowingswitchednetworktopologychanges.itmodifiesthe802.3frameheader,andthusrequiresthattheFCS itisatrunkingprotocolcapableofcarringuntaggedCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑:ht QUESTIONRefertotheexhibit.Eachofthesefourswitcheshasbeenconfiguredwithahostname,aswellasbeingconfiguredtorunRSTP.Nootherconfigurationchangeshavebeenmade.WhichthreeoftheseshowthecorrectRSTPportrolesfortheindicatedswitchesandinterfaces?(Choosethree.)SwitchA,Fa0/2,SwitchA,Fa0/1,SwitchB,Gi0/2,SwitchB,Gi0/1,SwitchC,Fa0/2,SwitchD,Gi0/2,CorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 判斷非根橋上的跟端口。在同一個(gè)交換機(jī)上，到根網(wǎng)橋的cost較小的那個(gè)端口會(huì)成為rootport。所以SwitchAFa0/1，SwitchDGi0/2，SwitchBGi0/1會(huì)成為相應(yīng)交換機(jī)上的RP3.判斷每個(gè)網(wǎng)段上的指定端定端口。SWB--SWD段：SWB的G0/1端口cost為19+19=38，SWD的G0/1端口cost為19，所以SWD的(有不懂的地方可以加了解 QUESTIONRefertotheexhibit.ThenetworkadministratornormallyestablishesanetsessionwiththeswitchfromsattempttotheswitchfromhostBfails,butshostA.However,hostAisunavailable.Theadministratortotheothertwohostsaresuccessful.whatistheissue?HostBandtheswitchneedtobeinthesameTheswitchneedsandappropriatedefaultgatewayTheswitchinterfaceconnectedtotherouterisHostBneedtobeassignedanIPaddressinvlanTheswitchinterfacesneedtheappropriateIPaddressesCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 管理交換機(jī)需要在交換機(jī)上設(shè)置defaultgateway和vlanQUESTIONRefertotheexhibit.Whatswitchprovesthespanning-treedesignatedportroleforthenetworksegmentthatservicestheprinters?CorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhatisonebenefitofPVST+reducestheCPUcyclesforalltheswitchesinthePVST+automaticallyselectstherootbridgelocation,toprovideoptimizedbandwidthPVST+allowtherootswitchlocationtobeoptimizedperPVST+supportsLayer3loadbalancingwithoutCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 攻城獅QUESTIONWhicharevalidmodesforaswitchportusedasaVLANtrunk?(ChooseCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONHowmanybroadcast sareshowninthegraphicassumingonlythedefaultvlanisconfiguredontheswitches?CorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhichthreeofthesestatementsregarding802.1Qtrunkingarecorrect?(Choose802.1QnativeVLANframesareuntaggedby802.1Qtrunkingportscanalsobesecure802.1Qtrunkscanuse10Mb/sEthernet802.1Qtrunksrequirefull-duplex,point-to-point802.1QtrunksshouldhavenativeVLANsthatarethesameatbothCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑:ht 802.1qnativevlan是不做標(biāo)記的，并且在trunk兩邊的native需要一致QUESTIONRefertotheexhibit.Theoutputthatisshownisgeneratedataswitch.Whichthreeofthesestatementsaretrue?(Choosethree.)Allportswillbeinastateofdiscarding,learning,orThiryVLANshavebeenconfiguredonthisThebridgepriorityislowerthanthedefaultvalueforspanningAllinterfacesthatareshownareonsharedAlldesignatedportsareinaforwardingTheswitchmustbetherootbridgeforallVLANsonthisCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibit.AttheendofanRSTPelectionprocess,whichaccesslayerswitchportwillassumethediscardingrole?Switch3,portSwitch3,portSwitch4,portSwitch4,portSwitch3,portSwitch3,portCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhichtermdescribesaspanning-treenetworkthathasallswitchportsineithertheblockingorforwardingCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhatarethepossibletrunkingmodesforaswitchport?(ChooseF.CorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 考點(diǎn)：考查交換機(jī)在trunk模式下的模式auto： 成為trunk，也主動(dòng)發(fā)DTP信息desirable：攻城獅QUESTIONWhichtwoofthesestatementsregardingRSTParecorrect?(ChooseRSTPcannotoperatewithRSTPdefinesnewportRSTPdefinesnonewportRSTPisaproprietaryimplementationofIEEE802.1DRSTPiscompatiblewiththeoriginalIEEE802.1DCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertotheexhibit.Whichtwostatementsaretrueoftheinterfacesonswitch1?(chooseAhubisconnecteddirectlytoFastEthernet0/1isconfiguredasatrunkFastEthernet0/5hasstaticallyassignedmacInterfaceFastEthernet0/2hasbeenMultipledevicesareconnecteddirectlytoFastEthernet0/1isconnectedtoahostwithmultiplenetworkinterfaceCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONThreeswitchesareconnectedtooneantherviatrunkports.Assumingthedefaultswitchconfiguration,whichswitchiselectedastherootbridgeforthespanning-treeinstanceofvlan1?theswitchwiththelowestMACtheswitchwiththehighestMACtheswitchwitchthehighestIPtheswitchwiththelowestIPCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 橋ID=橋優(yōu)先級(jí)+橋macQUESTIONWhatarethreeadvantagesofVLANs?(ChooseVLANsestablish sinswitchedVLANsutilizepacketfilteringtoenhancenetworkVLANsprovideamethodofconservingIPaddressesinlargeVLANsprovidealow-latencyinternetworkingalternativetoroutedVLANsallowaccesstonetworkservicesbasedondepartment,notphysicalVLANscangreatlysimplifyadding,moving,orchanginghostsontheCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: E：vlan允許基于邏輯劃分的網(wǎng)絡(luò)，不是物理位置。正確。F：攻城獅QUESTIONWhichtwobenefitsareprovidedbyusingahierarchicaladdressingnetworkaddressingscheme?(Choosereducesroutingtableauto-negotiationofmediaefficientutilizationofMACdedicatedcommunicationsbetweeneaseofmanagementandCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONWhatisthealternativenotationfortheIPV6addressCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: QUESTIONRefertothediagram.Allhostshaveconnectivitywithoneanother.Whichstatementsdescribetheaddressingschemethatisinuseinthenetwork?(Choosethree.)ThesubnetmaskinuseisThesubnetmaskinuseisTheIPaddress5canbeassignedtohostsinTheIPaddress05canbeassignedtohostsinTheLANinterfaceoftherouterisconfiguredwithoneIPTheLANinterfaceoftherouterisconfiguredwithmultipleIPCorrectAnswer:Section:LANSwitching 更新/講解/免費(fèi)答疑: 攻城獅QUESTIONWhichtwostatementsdescribecharacteristicsofIPv6unicastaddressing?(ChooseGlobaladdressesstartwithLink-localaddressesstartwithLink-localaddressesstartwithThereisonlyoneloopbackaddressanditisIfaglobaladdressisassignedtoaninterface,thenthatistheonlyallowableaddressfortheCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: ipv6的常規(guī)問題，globaladdress的其實(shí)段位2000::/3這個(gè)是定義好了的,D選項(xiàng)說的是換回地址,也就是ipv4的QUESTIONthenetworkadministratorhasbeenaskedtogivereasonsformovingfromipv4toipv6.whataretwovalidreasonsforadoptingipv6overipv4?(choosetwo)netaccessdoesnotrequireanochanageofdestinationaddressintheipv6chanageofsourceaddressintheipv6CorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: ,QUESTIONAnadministratormustassignstaticIPaddressestotheserversinanetwork.Fornetwork4/29,therouterisassignedthefirstusablehostaddresswhilethesalesserverisgiventhelastusablehostaddress.WhichofthefollowingshouldbeenteredintotheIPpropertiedboxforthesalesIPaddress:4SubnetMask:48DefaultIPaddress:54SubnetMask:DefaultIPaddress:0SubnetMask:48DefaultIPaddress:0SubnetMask:40DefaultIPaddress:0SubnetMask:40DefaultCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: QUESTIONWhichsubnetmaskwouldbeappropriateforanetworkaddressrangetobesubnettedforuptoeightLANs,witheachLANcontaining5to26hosts?CorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: QUESTIONHowmanybitsarecontainedineachfieldofanIPv648CorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑:ht QUESTIONWhichthreeapproachescanbeusedwhilemigratingfromanIPV4addressingschemetoanIPV6scheme.(choosethree)staticallymapIPV4addresstoIPV6configurationIPv4tunnelsbetweenIPV6useDHCPv6tomapIPV4addressestoIPV6 ingandtranslationtotranslateIPV6packetsintoIPV4configureIPV6enabledual-stackCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: 攻城獅QUESTIONRefertotheexhibit.InthisVLSMaddressingscheme,whatsummaryaddresswouldbesentfromrouterCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: QUESTIONHowisanEUI-64formatinterfaceIDcreatedfroma48-bitMACbyappending0xFFtotheMACbyprefixingtheMACaddresswithbyprefixingtheMACaddresswith0xFFandappending0xFFtobyinserting0xFFFEbetweentheupperthreebytesandthelowerthreebytesoftheMACbyprefixingtheMACaddresswith0xFandinserting0xFaftereachofitsfirstthreeCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: 攻城獅QUESTIONRefertotheexhibit.WhichisthemostefficientsummarizationthatR1canusetoadvertiseitsnetworkstoCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: QUESTIONWhichoptionisavalidIPv6CorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: QUESTIONWhichthreearecharacteristicsofanIPV6anycastaddress?(chooseany-to-manycommunicationdeliveryofpacketstothegroupinterfacethatisclosesttothesendingone-to-manycommunicationthesameaddressformultipledevicesintheauniqueIPV6addressforeachdeviceintheCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: CE發(fā)送到任播地址的分組被轉(zhuǎn)發(fā)到最近的端口（節(jié)點(diǎn)F組中每個(gè)節(jié)點(diǎn)有一個(gè)唯一的IV6地址（每臺(tái)設(shè)備可以有一個(gè)以上的端口，所以用節(jié)點(diǎn)來表示anycast》closet、nearestsamedressformultiple攻城獅QUESTIONAnationalretailchainneedstodesignanIPaddressingschemetosupportanationwidenetwork.Theneedsaminimumof300sub-networksanda umof50hostaddressespersubnet.WorkingwithonlyoneClassBaddress,whichofthefollowingsubnetmaskswillsupportanappropriateaddressingscheme?(Choosetwo.)CorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: 至少300個(gè)子網(wǎng)，每個(gè)子網(wǎng)至少50臺(tái)主機(jī)。使用一個(gè)B類地址來劃分。考點(diǎn)分析：這道題考的是VLSM。因?yàn)轭}中說每個(gè)網(wǎng)段最多50機(jī)器，且2^5<50<2^6，主機(jī)位至少是6300個(gè)子網(wǎng)，且是B類 每個(gè)子網(wǎng)只有30個(gè)可IPF：攻城獅QUESTIONRefertotheexhibit.AnetworkadministratorisaddingtwonewhoststoSwitchA.Whichthreevaluescouldbeusedfortheconfigurationofthesehosts?(Choosethree.)hostAIPaddress:hostAIPaddress:hostAdefaultgateway:hostBIPaddress:hostBdefaultgateway:hostBIPaddress:CorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: 考點(diǎn)分析：A接Port6口，Port6口屬于vlan10，所以A屬于網(wǎng)段4/27，且網(wǎng)關(guān)是8；B接Port9口，Port9口屬于vlan20，所以B屬于網(wǎng)段28/26，網(wǎng)關(guān)是30；單臂路由的攻城獅QUESTIONWhichIPv6addressistheall-routermulticastCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: 攻城獅QUESTIONwhichaddressrangeefficientlysummarizestheroutingtableoftheaddressesforrouterCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑: QUESTIONWhichIPv6addressisCorrectAnswer:Section:IPaddressingIPv4andIPv6 更新/講解/免費(fèi)答疑:ht D只能有一個(gè)QUESTIONWichcommandcanyouusetom