CCNA+第四学期章节测试题答案e43Word文档下载推荐.docx
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CCNA+第四学期章节测试题答案e43Word文档下载推荐.docx
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窗体底端
Observable
Description
MaxValue
correctnessofresponse
2pointsforOption3
0pointsforanyotheroption
2
WhattwomethodsdoesFrameRelaytechnologyusetoprocessframesthatcontainerrors?
(Choosetwo.)
FrameRelayservicesdependontheupperlayerprotocolstohandleerrorrecovery.
Itrequiresthereceivingdevicetorequestthatthesenderretransmiterroneousframes.
FECN,BECN,andDEbitsaresetintheframestominimizeerrors.
Thereceivingdevicedropsanyframesthatcontainerrorswithoutnotifyingthesender.
Theframerelayswitchnotifiesthesenderthaterrorsweredetected.
Option1andOption4arecorrect.
1pointforeachcorrectoption.
0pointsifmoreoptionsareselectedthanrequired.
3
Whatbestdescribestheuseofadata-linkconnectionidentifier(DLCI)?
localaddressidentifyingadestinationrouteracrossaFrameRelaynetwork
locallysignificantaddressusedtoidentifyavirtualcircuit
logicaladdressidentifyingtheinterfacebetweenarouterandaFrameRelayswitch
logicaladdressusedtoidentifytheDCE
2pointsforOption2
4
WhatiscreatedbetweentwoDTEsinaFrameRelaynetwork?
ISDNcircuit
limitedaccesscircuit
switchedparallelcircuit
virtualcircuit
2pointsforOption4
5
WhichtwoitemsallowtheroutertomapdatalinklayeraddressestonetworklayeraddressesinaFrameRelaynetwork?
ARP
RARP
ProxyARP
InverseARP
LMIstatusmessages
ICMP
Option4andOption5arecorrect.
6
Refertotheexhibit.Apingissenttoaddress192.168.50.10fromthePeanutrouter.WhichDLCIwillbeusedtosendtheping?
110
115
220
225
2pointsforOption1
7
Refertotheexhibit.Whateffectdoesthepoint-to-pointconfigurationonsubinterfaceS0/0.110haveontheoperationoftherouter?
IthelpstoconserveIPaddresses.
ItestablishesmultiplePVCconnectionstomultiplephysicalinterfaces.
Iteliminatessplithorizonissueswithoutincreasingthelikelihoodofroutingloops.
Itrequirestheconfigurationoftheencapsulationcommandonthesubinterface.
8
WhichthreeactionsmightaFrameRelayswitchperformwhenitdetectsanexcessivebuild-upofframesinitsqueue?
(Choosethree.)
putsaholdonacceptingframesinexcessoftheCIR
dropsframesfromthequeuethathavetheDEbitset
reducesthenumberofframesitsendsoverthelink
re-negotiatesflowcontrolwiththeconnecteddevice
setstheFECNbitonallframesitreceivesonthecongestedlink
setstheBECNbitonallframesitplacesonthecongestedlink
Option2,Option5,andOption6arecorrect.
9
Refertotheexhibit.Whichtwostatementsaretruegiventheoutputshown?
TheIPaddressofthelocalFrameRelayinterfaceis172.16.1.4.
ThelocalDLCInumberis401.
InverseARPisbeingusedonthisconnection.
Thisinterfaceisintheactivestateandintheprocessofnegotiatingconfigurationparameters.
Multicastisnotenabledonthisconnection.
Option2andOption3arecorrect.
10
WhichFrameRelaytopologyisacompromiseofcosts,reliability,andcomplexitywhentheWANcontainsoneheadquarterssite,40regionalsites,andseveralsiteswithineachregionalsite?
star
fullmesh
partialmesh
point-to-multipoint
point-to-point
11
Refertotheexhibit.WhatcanbedeterminedabouttheFrameRelayswitchfromtheoutputshown?
Itiscurrentlynottransmittingdata.
ItisintheprocessofestablishingthePVC.
IthasputaholdonprocessingframesinexcessoftheCIR.
Itisexperiencingcongestion.
12
Refertotheexhibit.FrameRelayconnectivityhasbeenconfiguredinthenetworkandOSPFisusedastheroutingprotocol.RouterR1cansuccessfullypingtherouterR2serialinterface.WhenR1attemptstopingnetwork192.168.3.0/24thepingfails.Whatadditionalconfigurationshouldbeappliedonallrouterstoremedytheproblem?
AddthebroadcastkeywordintheFrameRelaymapcommandonbothrouters.
Issuetheframe-relayinterface-dlcicommandinadditiontotheframe-relaymapcommandonbothrouterinterfaces.
Removetheframe-relaymapcommandandreplacewiththeframe-relayinterface-dlcicommandonbothrouterinterfaces.
Applythenoframe-relayinverse-arpcommandonbothrouterinterfaces.
13
WhichstatementaboutFrameRelaysubinterfacesiscorrect?
MultipointinterfaceswillautomaticallyforwardroutingbroadcastsbutwillconsumemoreIPaddressesthanpoint-to-pointsubinterfaceswillconsume.
Point-to-pointsubinterfacesactlikeleasedlinesandeliminatesplit-horizonroutingissues.
InterfaceswithmultiplePVCsrequireaseparatesubinterfaceforeachPVC.
Multipointconfigurationscannotusesubinterfaces.
14
Refertotheexhibit.YouareanetworkadministratorwhohasbeentaskedwithcompletingtheFrameRelaytopologythatinterconnectstworemotesites.RouterHQbelongstoboththe172.16.1.0/24and172.16.2.0/24subnetswithIPaddressesof172.16.1.3and172.16.2.3respectively.TrafficbetweenR1andR2musttravelthroughHQfirst.HowshouldtheserialinterfaceonHQbeconfiguredtocompletethetopology?
onemultipointsubinterface
twopoint-to-pointsubinterfaces
withthephysicalinterfaceconfiguredwithtwoipaddresses
oneIPaddressonapoint-to-pointsubinterfaceandoneIPaddressonthephysicalinterface
15
WhatconsiderationmustbetakenintoaccountifRIPisusedonFrameRelaymultiaccessnetworks?
Toforwardroutingupdates,address-to-DLCImappingmustbedoneviatheuseoftheframe-relaymapcommandcoupledwiththebroadcastkeyword.
InverseARPmustbeenabledtoturnroutingupdatebroadcastsintounicasttrafficthatcanbepropagatedtootherFrameRelaynodes.
Becausebroadcasttrafficisnotsupported,RIPv1cannotbeimplementedonFrameRelaynetworks.
Toforwardbroadcastroutingupdates,dynamicmappingmustbeenabled.
16
Refertotheexhibit.WhichstatementexplainswhytheFrameRelayconnectionbetweenR1andR2isfailing?
Splithorizonmustbedisabled.
TheLMItypemustbespecified.
Logicalsubinterfacesmustbeusedinstead.
Theframe-relaymapcommandsareusingincorrectDLCIs.
17
Refertotheexhibit.Rou
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