ccna final4E英文A+B两卷Word下载.docx
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ccna final4E英文A+B两卷Word下载.docx
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router#showprotocolsserial0/0
router#showversion
router#showinterfacesserial0/0
3
Whichstatementsarecorrectaboutthepointinthenetworkwheretheresponsibilityoftheserviceproviderends?
(Choosethree.)
*TheInternationalpointisonthecustomersideofthenetworkterminatingunit(NTU).
*TheUnitedStatespointisattheinterfaceofthecustomer-providedequipmentandthelocalloop.
TheresponsibilityforthispointiscontrolledbyIANA.
*Thepointiscalledthedemarcationpoint.
Thepointistypicallylocatedattheserviceprovider'
scentraloffice.
Thepointislocatedbetweenthecustomer'
slocalareanetworks.
4
AsystemadministratormustprovideInternetconnectivityfor25hostsataninsuranceagency.TheISPhasassignedtwopublicIPaddressestothiscompany.WhatcantheadministratordotoprovideInternetaccesstoall25usersatthesametime?
*ConfiguretherouterwithdynamicNATwithPAT.
ConfiguretherouterwithdynamicNATfor25users.
ConfiguretherouterwithDHCPandstaticNAT.
ConfiguretherouterwithstaticNATforall25users.
Thiscannotbedonewithonlytwopublicaddresses.
5
AsystemadministratorisunabletopingtheSerial0/0interfaceofRouterBfromRouterA.Duringthetroubleshootingprocess,thefollowingfactsareestablished:
-IPaddressingandsubnetmasksarecorrect.-RouterAisaCiscorouterandRouterBisarouterfromanothervendor.-RouterAisconfiguredwiththedefaultencapsulation.-Theserialinterfacesonbothroutersareup.-Theprotocolisdownontheserialinterfacesofbothrouters.Whatshouldtheadministratordotosolvetheproblem?
AddaclockrateonRouterA.
EnabletheserialinterfaceonRouterB.
*ChangetheencapsulationonbothrouterstoPPP.
ConnecttheserialcabletothecorrectinterfaceonRouterB.
UsethecorrectserialcabletoattachtheCSU/DSUtoRouterB.
6
AnetworkadministratormustprovideWANconnectivitybetweentheCentralofficeandthreeremotesites:
EastBranch,WestBranch,andRemote.TheEastBranchandWestBranchofficesreceivesalesordersandtransmitshippingconfirmationstotheCentralofficeconsistentlythroughouttheday.TheRemoteofficeisstaffedbyonesalespersonwhotravelsthroughthenorthwesternterritory.ThesalespersonoccasionallyneedstoconnecttotheCentralofficefore-mailaccess.HowshouldthenetworkadministratorconnectthesesitestotheCentraloffice?
(Choosetwo.)
ConnecttheEastBranchandWestBranchremoteofficeswithISDNconnections.
*ConnecttheEastBranchandWestBranchofficeswithFrameRelayconnections.
ConnecttheEastBranchandWestBranchofficeswithPOTSdial-upconnections.
ConnecttheRemoteofficewithaFrameRelayconnection.
ConnecttheRemoteofficewithanISDNconnection.
*ConnecttheRemoteofficewithaPOTSdial-upconnection.
7
AsystemadministratorneedstoconfiguretheregionalofficewithISDNforDDRconnectionstothreeremotesites.EachremotesiterequiresdifferentIPsubnets,differentencapsulations,anddifferentauthenticationmethods.Thesiteswillnotbeconnectedatthesametime.Thecompanywouldliketoaccomplishthisinthemostcosteffectivemanner.WhatmethodcanthesystemadministratorusetoaccomplishthistaskusingthefewestBchannels?
InstallandconfigureaPRI.
InstallandconfigureaBRIinterfacewithseparateSPIDsforeachremotesite.
InstallandconfigureaBRIwithmultipleswitchtypesinglobalconfiguration.
*InstallandconfigureaBRIusingdialerprofiles.
InstallandconfigureaseparateBRIforeachremotesite.
8
AnetworkadministratorishavingdifficultyinestablishingaseriallinkbetweenaCiscorouterandarouterfromanothervendor.BothroutersareconfiguredforHDLCencapsulation.Whichstatementsaretrueregardingthisconfiguration?
*TheCiscoHDLCframeusesaproprietary"
Type"
fieldthatmaynotbecompatiblewithequipmentofothervendors.
HDLCrequiresaclockratetobeconfiguredontheroutersatbothendsoftheseriallink.
*PPPencapsulationisrecommendedforseriallinksbetweenequipmentfrommultiplevendors.
UsernamesmustbeconfiguredatbothendsoftheHDLCseriallink.
TheHDLCvendortypemustbeenabledontheCiscorouter.
ThereisamismatchintheHDLCauthenticationpasswordconfigurations.
9
WhichofthefollowingistheorderforthethreephasesofestablishingaPPPseriallinkwithauthentication?
authentication,link-establishment,networklayerprotocols
authentication,networklayerprotocols,link-establishment
networklayerprotocols,link-establishment,authentication
networklayerprotocols,authentication,link-establishment
*link-establishment,authentication,networklayerprotocols
link-establishment,networklayerprotocols,authentication
10
TheserialPPPlinkbetweentheLeftandRightroutersisconfiguredasshowninthediagram.WhichconfigurationissueexplainswhythelinkisunabletoestablishaPPPsession?
TheIPaddressesmustbeondifferentsubnets.
*Theusernamesaremisconfigured.
ThepasswordsmustbedifferentfortheCHAPauthentication.
Theclockratemustbe56000.
Theclockrateisconfiguredonthewrongendofthelink.
Interfaceserial0/0onLeftmustconnecttointerfaceserial0/1onRight.
11
Refertotheexhibit.ThelinkbetweentheRTR-1andRTR-2routersisconfiguredasshownintheexhibit.AlthoughtheshowinterfacescommandshowstheinterfacestatusasSerial0isup,lineprotocolisup,IPtrafficisnotcrossingthislink.Whatistheproblem?
Theusernamesaremisconfigured.
*TheIPaddressesarenotinthesamesubnet.
Interfaceserial0/0onRTR-1mustconnecttointerfaceserial0/1onRTR-2.
12
Atechnicianenterstheinterfaceserial0/0.1multipointcommandwhenconfiguringarouter.Whateffectwillthemultipointkeywordhaveinthisconfiguration?
*Split-horizonissueswillneedtoberesolvedforthisnetworkifRIPistheroutingprotocol.
AsubinterfacewillbedefinedforeachPVC.
*Alltheparticipatinginterfacesofremoterouterswillbeconfiguredinthesamesubnet.
AsingleDLCIwillbeusedtodefineallthePVCstotheremoterouters.
AnIPaddresswillneedtobeconfiguredonthemaininterface.
13
WhichroutercommandwouldbeusedtoassociateaLayer2addresswiththecorrespondingLayer3addressintheinternetworkinthediagram?
RouterA(config-if)#frame-relaypvc100192.168.15.2
RouterA(config-if)#dialer-mapip192.168.15.1100broadcast
*RouterA(config-if)#frame-relaymapip192.168.15.2100broadcast
RouterA(config-if)#dialer-map192.168.15.1101serial0broadcast
RouterA(config-if)#frame-relaydlci101192.168.15.1broadcast
RouterA(config-if)#dialer-map192.168.15.1inverse-arpbroadcast
14
Refertotheexhibit.TworoutersareconnectedthroughaFrameRelaypoint-to-pointPVC.TheILM-5routerisfromavendorotherthanCisco.WhichinterfacecommandisrequiredtoconfigurethelinkbetweentheCiscoILM-3routerandrouterILM-5?
ILM-3(config-if)#encapsulationframe-relaycisco
ILM-3(config-if)#frame-relaypvcmultipoint
*ILM-3(config-if)#encapsulationframe-relayietf
ILM-3(config-if)#frame-relaylmi-typeansi
ILM-3(config-if)#frame-relaypvcpoint-to-point
15
Whatdoestheoutputoftheshowframe-relaymapcommandshownbelowrepresent?
(Choosetwo.)Serial0(up):
ip172.30.151.4dlci122,dynamic,broadcast,statusdefined,active
*172.30.151.4representstheIPaddressoftheremoterouter.
172.30.151.4representstheIPaddressofthelocalserialinterface.
DLCI122representstheinterfaceoftheremoterouter.
*broadcastindicatesthatadynamicroutingprotocolsuchasRIPv1cansendpacketsacrossthisPVC.
dynamicindicatesthatadynamicroutingprotocolisenabledforthisconnection.
activeindicatesthattheARPprocessisworking.
16
Theoutputoftheshowinterfacesserial0/0commandforaframe-relayconnectionindicatesthattheseriallineisupbutthelineprotocolisdown.Whatarepossiblecausesforthis?
*ThereisanLMI-typemismatchbetweentheFrameRelayswitchandtherouter.
*Thereisnoclockpresentontheserialinterface.
Theinterfaceisshutdown.
RARPisnotfunctioningontherouter.
Thecableisdisconnected.
17
Whataretwowaystoresolvesplit-horizonissuesinaFrameRelaynetwork?
*createafull-meshtopology
disableInverseARP
*usepoint-to-pointsubinterfaces
usemultipointsubinterfaces
removethebroadcastkeywordfromtheframe-relaymapcommand
18
Anetworkadministratorissuedthecommandshowframe-relaypvc.TheresponsefromtheroutershowsthestatusofaPVCasdeleted.Whatisthereasonforthisoutput?
TheDLCIisusingthewrongLMItype.
TheDLCIisus
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