网络学院27Word格式.docx

网络学院27Word格式.docx

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RouterAisnotsetupwithRIPasaroutingprotocol.

Ripversion2willautosummarizeroutesbydefault.

RouterBisnotsetuptoadvertisethe192.168.1.64/30network.

窗体底端

Observable

Description

MaxValue

correctnessofresponse

2pointsforOption3

0pointsforanyotheroption

2

Thisitemreferencescontentfromthefollowingareas:

CCNAExploration:

RoutingProtocolsandConcepts

∙7.2.2Auto-summaryandRIPv2

Refertotheexhibit.WhichcommandonwhichrouterwillallowRouter1tolearnaboutthe192.168.0.0/20network?

Router1（config）#ipclassless

Router1（config-router）#nopassive-interfaceserial0/1/1

Router2（config-router）#version2

Router2（config-router）#neighbor10.0.0.2

∙7.4.2CommonRIPv2issues

3

WhataretworeasonstoimplementRIPversion2ratherthanRIPversion1?

（Choosetwo.）

RIPversion2supportsVLSM.

RIPversion2supportsmorethan16routers.

RIPversion2supportsclassful（andnotclassless）routing

RIPversion2supportsroutingupdateauthentication.

RIPversion2supportsmulti-areas.

RIPversion2usestheDijkstraalgorithmratherthantheBellman-Fordalgorithm.

Option1andOption4arecorrect.

1pointforeachcorrectoption.

0pointsifmoreoptionsareselectedthanrequired.

∙7.4.3Authentication

4

HowareRIPv1andRIPv2similartooneanother?

（Choosethree.）

Theybothusehopcountasametric.

Theybothhavethesamemetricvalueforinfinitedistance.

TheybothuseabroadcastIPaddresstosendupdatestotheirneighbors.

Theybothsendsubnetmaskinformationintheirupdates.

Theybothprovideforauthenticationofupdatesources.

Theybothusesplithorizontopreventroutingloops.

Option1,Option2,andOption6arecorrect.

∙7.2.1EnablingandVerifyingRIPv2

5

Refertotheexhibit.RoutersEastandWestareconfiguredusingRIPv1.Bothroutersaresendingupdatesabouttheirdirectlyconnectedroutes.TheEastroutercanpingtheWestrouterserialinterfaceandWestcanpingtheserialinterfaceofEast.However,neitherrouterhasdynamicallylearnedroutesfromtheother.Whatismostlikelytheproblem?

Agatewayoflastresortisrequired.

SubnettingisnotsupportedbyRIPv1.

VLSMisnotsupportedbyRIPv1.

Oneoftheroutersneedsaclockrateontheserialinterface.

∙7.1.4RIPv1:

NoVLSMSupport

6

Refertotheexhibit.WhichcommandwillallowRouter2tolearnaboutthe192.168.16.0/28network?

Router1（config-router）#network192.168.16.0

2pointsforOption2

∙7.4.1VerificationandTroubleshootingCommands

7

Refertotheexhibit.AllroutersarerunningRIPversion2.JAXisconfiguredtojustadvertisethe10.0.0.0/24network.CHIisconfiguredtoadvertisethe172.16.0.0/16network.Anetworkadministratorentersthecommandsshownintheexhibit.Whatchangeswilloccurinthisnetwork?

TheJAXrouterwillignoreupdatesforthe172.16.0.0/16networkduetosplithorizonissues.

TheCHIrouterwillinstallaroutetothe192.168.0.0/16networkinitsroutingtable.

TheroutingtableforCHIwillhavethe192.168.0.0/16routebutitwill