642611考试指南及题库分享.docx

642611考试指南及题库分享.docx

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642611考试指南及题库分享

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642-611考试资料

CCIPImplementingCiscoMPLSExam（MPLS）

科目编号：

642-611

科目名称：

CCIPImplementingCiscoMPLSExam（MPLS）

ImplementingCiscoMPLSExam

考试认证:

CCIP

考试时间:

90分钟（55-65个问题）

可用语言:

英语

642-611考试是Cisco公司的CCIPImplementingCiscoMPLSExam（MPLS）认证考试官方代号，CCIPImplementingCiscoMPLSExam（MPLS）认证作为全球IT领域专家Cisco热门认证之一，是许多大中IT企业选择人才标准的必备条件。

考试描述：

heMPLSexamisaqualifyingexamfortheCCIPcertification（CiscoCertifiedInternetworkProfessional）.The642-611MPLSexamwilltestmaterialscoveredundertheImplementingCiscoMPLScourse.TheexamwillcertifythatthesuccessfulcandidatehasknowledgeandskillsnecessarytogatherinformationfromthetechnologybasicstosomeofthemoreupdatedfeaturesandfunctionssuchasTrafficEngineering,FastRerouteandanyTransportoverMPLS（AToM）.TheexamcoverstopicsonMPLSConcepts,MPLSLabelAssignmentandDistribution,Frame-Mode/Cell-ModeMPLSImplementationonCiscoIOSPlatforms,MPLSVirtualPrivateNetworksTechnology,MPLSVPNImplementation,ComplexMPLSVPNs,andInternetAccessfromaMPLSVPN.

考试内容：

hefollowinginformationprovidesgeneralguidelinesforthecontentlikelytobeincludedontheexam.However,otherrelatedtopicsmayalsoappearonanyspecificdeliveryoftheexam.

MPLSFundamentals

ExplainbasiccoreMPLStechnologyandconcepts

ExplainthefunctionofMPLSLabelsandLabelStack

IdentifyMPLSApplications

MPLSOperation

DescribethecharacteristicsandbehaviorsofLabelDistributioninFrame-modeMPLS

ExplainConvergenceinFrame-modeMPLS

DescribethecharacteristicsandbehaviorsofLabelDistributionoverLC-ATMInterfacesandVCMerge

DescribethefeaturesofMPLSLabelAllocation,Distribution,andRetentionModes

ExplaintheprocessofLDPNeighborDiscovery

Frame-Mode/Cell-ModeMPLSImplementation,ConfigurationandTroubleshooting

IdentifythefunctionsofCEFSwitching

ExplainandconfigureFrame-modeMPLSonCiscoIOSplatforms

MonitorMPLSonCiscoIOSplatforms-Frame-modeinterfaces

TroubleshootFrame-ModeMPLSconfigurationsonCiscoIOSPlatforms

ExplainandconfigureLabel-ControlledATMMPLS

ExplainandconfigureLC-ATMMPLSoverATMVirtualPath

MonitorLC-ATMMPLSonCiscoIOSplatforms

MPLSVirtualPrivateNetworksTechnology

DescribethecharacteristicsandfunctionsofVirtualPrivateNetworks

DescribeOverlayandPeer-to-PeerVPNs

ExplainMajorVPNCategorization

DescribeMPLSVPNArchitecture

DescribetheMPLSVPNRoutingModel

ExplaintheprocessofMPLSVPNPacketForwarding

MPLSVPNImplementation,ConfigurationandTroubleshooting

ExplainMPLSVPNMechanismssupportedonCiscoPlatforms

ConfigureVRFtables

ConfigureMP-BGPSessionbetweenPErouters

ConfigureSmallScaleRoutingProtocols

MonitorMPLSVPNOperation

ConfigureOSPFastheRoutingProtocol

ConfigureBGPastheRoutingProtocol

TroubleshootbasicMPLSVPNconfigurationerrors

ComplexMPLSVPNs

DescribetheadvancedVRFImport/ExportFeatures

ExplainthecharacteristicsofOverlappingVPNs

ExplainthefeaturesofCentralServicesVPNs

DescribeManagedCERouterService

InternetAccessfromaMPLSVPN

ExplainVPNInternetAccessTopologies

DescribeVPNInternetAccessImplementationMethods

DescribethemethodstoSeparateInternetAccessfromVPNService

InternetAccessBackboneasaSeparateVPN

考试题库：

Exam:

Cisco642-611

Title:

CCIPImplementingCiscoMPLSExam（MPLS）

1.InreferencetothediagramdepictingtheflowofroutingupdatesinanoverlappingVPN,whichstatementistrue?

A.SitesA1andA2willimportallnetworkswithRTs123:

750and123:

1000.

B.SitesB1andB2willexportallnetworkswithRTs123:

760and123:

1000.

C.SitesA1andA2communicatewithSitesB1andB2viaA-CentralandB-Central.

D.SiteA-CentralexportsRTs123:

750and123:

1000.

E.SiteB-CentralisexportingandimportingRT123:

1000soitcancommunicatewithsitesA1andA2.

Answer:

D

2.WhichthreestatementsarecorrectregardingLayer2overlayVPNsandpeer-to-peerVPNs?

（Choosethree.）

A.Peer-to-peerVPNsrequiretheestablishmentofvirtualcircuitstoconnectthedifferentcustomersitestogether.

B.Peer-to-peerVPNsrequiretheserviceprovidertoparticipateinthecustomerrouting,acceptingcustomerroutes,

transportingthemacrosstheserviceproviderbackbone,andfinallypropagatingthemtoothercustomersites.

C.Withpeer-to-peerVPNs,theserviceproviderisresponsiblefortransportofLayer2framesbetweencustomersites,

andthecustomertakesresponsibilityforallhigherlayers.

D.TheimplementationofLayer2overlayVPNsisthetraditionalswitched-WANmodel,implementedwith

technologieslikeX.25,FrameRelayorATM.

E.WithLayer2overlayVPNs,theserviceproviderisnotawareofcustomerroutingandhasnoinformationabout

customerroutes.

F.ItissimpletoimplementLayer2overlayVPNsbecausetheCustomerEdge（CE）routerjustneedsaconnectionto

theServiceProvider'sProviderEdge（PE）router.

Answer:

BDE

3.WhataretwodrawbackswhentheInternetisaccessedthroughadedicatedsubinterfaceimplementation?

（Choose

two.）

A.TheVRFwillleakroutesintotheglobalroutingtable.

B.TheProutermustrunbothanIGPandBGP.

C.ThePEroutersmustperformInternetrouting.

D.AlimitedsetofInternetserviceswillbeimplemented.

E.AseparatephysicallinkorspecificWANencapsulationisrequired.

Answer:

CE

4.WhichcomponentofMPLSarchitectureisasimplelabel-basedforwardingenginethatisindependentofthetypeof

routingprotocolorlabelexchangeprotocol?

A.controlplane

B.dataplane

C.routingplane

D.forwardingplane

Answer:

B

5.Refertothediagram.WhatproblemcanbecausedbythesecondProutersummarizingtheloopbackaddressof

theegressPErouter?

A.ThefirstProuterwillbefacedwithaVPNlabelwhichitdoesnotunderstand.

B.ThesecondProuterwillbefacedwithaVPNlabelwhichitdoesnotunderstand.

C.TheegressPErouterwillnotbeabletoestablishalabelswitchpath（LSP）totheingressPErouter.

D.Alabelswitchpath（LSP）willbeestablishedfromtheingressPEroutertotheegressPErouter,aneventthatis

notdesirable.

E.TheingressPErouterwillnotbeabletoreceivetheVPNlabelfromtheegressPErouterviaMP-IBGP.

Answer:

B

6.Forwhichpurposeisthecommandmplsldpmaxhopsused?

A.InlargeATM-MPLSnetworks,theLFIBcanbecometoolargeanditmaybenecessarytolimitthemaximum

diameteroftheMPLSLSPs.

B.Becausedownstream-on-demandlabelallocationuseshopcounttocontrolloopdetection,itmaybenecessaryto

limitthemaximumdiameteroftheMPLSnetwork.

C.Becauseend-to-enddelaycancauseproblemswithsomevoiceapplications,itmaybenecessarytolimitthe

maximumdiameteroftheMPLSnetwork.

D.WheninterconnectinglargeframemodeMPLSandcellmodenetworksitmaybenecessarytolimitthemaximum

networkdiametertopreventforwardingloops.

Answer:

B

7.Inacentralservicestopology,whichroutesdoclientVRFscontain?

A.routesfromtheclientsite,butnotfromtheserversite

B.routesfromtheserversite,butnotfromtheclientsite

C.routesfromboththeclientsiteandtheserversite

D.onlyEBGProutesfromeithertheclientsiteortheserversite

Answer:

C

8.TheexhibitshowsatopologywherethecustomerisusingInternetaccessthroughacentralfirewallattheircentral

site.Ifthecustomer'sMPLSVPNandtheInternetaccesstrafficsharethesameserviceproviderbackbone,which

twoofthefollowingstatementsaretrue?

（Choosetwo.）

A.CustomerInternettrafficcancrosstheserviceproviderbackbonetwice,firstasVPNtrafficandthenasInternet

traffic.

B.EachcustomersiteCEroutermustperformNATifthecustomerisusingprivateIPaddresses.

C.Suboptimalroutingofthecustomer'sVPNtrafficwilloccur.

D.ThePErouterswillneedtoexchangebothVPNv4andIPv4BGProutingupdates.

E.BGPmustbeusedastheroutingprotocolbetweentheCEandPErouters.

Answer:

AD

9.Inthediagram,Internetaccessisthroughadedicatedsubinterfaceimplementation.Whichofitsroutingtableswill

PE-2usetoforwardpacketsfromSite-2toSite-1?

A.theglobalroutingtable

B.theVPNv4routingtable

C.theVRFAroutingtable

D.theVRFAFIB

E.thePE-IGroutingtable

Answer:

C

10.WhichstatementistrueaboutoverlappingVPNs?

A.SitesthatparticipateinmorethanoneVPNimportrouteswithRTsfromanyVPNinwhichtheyparticipateand

exportrouteswithRTsforallVPNsinwhichtheyparticipate.

B.SitesthatparticipateinmorethanoneVPNimportrouteswithRTsforallVPNsinwhichtheyparticipateand

exportrouteswithRTsfornoneoftheVPNsinwhichtheyparticipate.

C.SitesthatparticipateinmorethanoneVPNonlyimportrouteswithRTsforallVPNsinwhichtheyparticipate.

D.NoneoftheabovestatementsarecorrectregardingoverlappingVPNs.

Answer:

A

11.Refertothediagram.HowmanyVRFtablesareneededtosupportthreeVPNs（CustomerA,CustomerB,anda

VoIPVPN）withthefollowingrequirements:

A.1VRF

B.3VRFs

C.4VRFs

D.5VRFs

E.7VRFs

Answer:

D

12.WhichkindoflinkdoesaLayer3overlayVPNuse?

A.emulatedpoint-to-point

B.dedicatedpoint-to-point

C.point-to-multipoint

D.permanentvirtualcircuits

Answer:

A

13.Inthediagram,theInternetisaccessedthroughadedicatedInternetVPNimplementation.Whichroutingtable

willPE-IGusetoforwardpacketsfromtheInternettoSite-2?

A.Globalroutingtable

B.VPNv4routingtable

C.VRFAroutingtable

D.VRFInternetroutingtable

Answer:

D

14.WhatistrueabouthowMPLSimpl