第三期English FormJ1a DRSEnt v40 Final.docx

第三期English FormJ1a DRSEnt v40 Final.docx

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第三期EnglishFormJ1aDRSEntv40Final

Refertotheexhibit.WhichIPaddresscanbeassignedtotheFa0/0interfaceofR1toenablehostAtoaccesshostB?

192.168.1.32/26

192.168.1.64/26

192.168.1.126/26

192.168.1.129/26

WhataretwocharacteristicsofEIGRP?

（Choosetwo.）

Itsupportsamaximumhopcountof15.

Itsendssmallhellopacketstomaintainknowledgeofitsneighbors.

Itforwardscompleteroutingtablesinitsupdatestoneighboringrouters.

Itsupportsequalandunequalcostloadbalancing负载平衡

Itsupportsonlyonenetworklayerprotocol.

Refertotheexhibit.ThenetworkisusingOSPFastheroutingprotocol.Anetworkadministratorissuestheshowipospfneighborcommandtocheckthestatusofoperation.Whichstatementistrue?

RBhasthelowestpriorityvalue.

RCandRDhavethelowestrouterIDsonthenetwork.

RAhasestablishedadjacencieswithallneighborrouters.

RAandRBcannotformanadjacencybecausetheyarestuckinthe2-waystate.

Refertotheexhibit.Whatisthepurposeofthecommand:

RouterA（config）#access-list1permit192.168.16.00.0.0.255?

ItidentifiestrafficonallinsideinterfacestobetranslatedandgivenaccesstotheISProuter.

Itidentifiestrafficfromthefa0/1interfacetobetranslatedandgivenaccesstotheISProuter.

ItallowstrafficfromtheISPtoreachalloftheinsideinterfaces.

Itidentifiestrafficfromthefa0/0interfacetobetranslatedandgivenaccesstotheISProuter.

ItallowstrafficfromtheISProutertothefa0/1interface.

Whatwillbethetwowildcardmasksrequiredinanextendedaccessliststatementthatblockstraffictohost192.168.5.45fromthe172.16.240.0/27network?

（Choosetwo.）

0.0.0.0

255.255.240.0

255.255.255.255

0.0.31.255

255.255.255.240

0.0.0.31

WhichtwostatementsaretrueaboutthenativeVLANonaswitch?

（Choosetwo.）

ItrequiresaspecialVLANIDtag.

ItisunabletobechangedtoadifferentVLAN.

Untaggedtrafficslowstheswitchingprocessdown.

ThenativeVLANdefaultstoVLAN1onCiscoCatalystswitches.

UntaggedframesthatarereceivedonatrunkbecomemembersofthisVLAN.

WhichstatementisaccurateabouttheCIRinFrameRelay?

ItisimportanttopurchaseaCIRthatmatchesthehighestbandwidthrequirementsoftheenterprise.

TheCIRcanbenolowerthantheportspeedofthelocalloop.

TheCIRdefinesthecontractedmaximumrateavailablefromtheserviceproviderontheFrameRelaycircuit.

ItispossibletoburstovertheCIRifbandwidthisavailable.如果带宽允许，则突发速率有可能超出CIR的突发量

Refertotheexhibit.Inwhatsequence（fromfirsttolast）doesanOSPFrouterchecktheparameterslistedwhenselectingtheDR?

C,B,A,D

D,C,B,A

A,B,C,D

A,C,B,D

B,C,A,D

Refertotheexhibit.R1andR2areconnectedviaserialinterfaces.BothinterfacesshowthatthereisLayer2connectivitybetweenthem.TheadministratorverifiesthatCDPisoperational;however,pingsbetweenthetwointerfacesareunsuccessful.Whatisthecauseofthisconnectivityproblem?

nosetloopback

incorrectsubnetmaskonR2

incompatiblebandwidth

incorrectIPaddressonR1

incompatibleencapsulation

Refertotheexhibit.AnetworkadministratornoticedthattheVLANconfigurationchangesatSW2didnotpropagate传播toSW3.Onthebasisofthepartialoutputoftheshowvtpstatuscommand,whatisthepossiblecauseoftheproblem?

VTPV2modeisdisabled.

SW3isconfiguredastransparentmode.

ThenumberofexistingVLANsdoesnotmatch.

Theconfigurationrevisionnumberdoesnotmatch.

WhenMD5authenticationisusedforOSPFroutingprotocolauthentication,whattwofactsareknownaboutthekey?

（Choosetwo.）

Thekeypassesbetweenroutersinplaintext.

Thekeyisusedtohelpgenerateanencryptednumberforauthentication.密钥用于帮助生成验证用的加密数字

Thekeypassesbetweenroutersinencryptedform.

Thekeyisnevertransmitted.

Thekeycanbecapturedbyusingapacketsniffer.

Refertotheexhibit.Internetaccessiscrucialforthecompanynetworkshown.InternetaccessisprovidedbytwoISPs.ISP1istheprimaryproviderandISP2isthebackupprovider.ThenetworkadministratorconfiguresBorderRastheborderroutersothatinnormaloperations,allInternettrafficgoesthroughISP1.However,ifthelinktoISP1fails,thenBorderRwillautomaticallyforwardInternettraffictoISP2.Theadministratorconfigurestwodefaultroutes:

BorderR（config）#iproute0.0.0.00.0.0.0192.168.100.1200

BorderR（config）#iproute0.0.0.00.0.0.0172.16.1.1

However,whentheadministratorissuedtheshowiproutecommandtoverifytheconfiguration,onlytheseconddefaultrouteisintheroutingtable.Whyisthefirstdefaultroutenotshowing?

Thefirstconfigurationcommandoverwritesthesecondcommand.

ThefirstdefaultroutewillbeinstalledintotheroutingtableifthereistrafficwithanIPaddressthatisdestinedforthe192.168.100.0network.

ThisisexpectedbecausethelinktoISP1isactive.IfthelinktoISP1goesdown,thenthefirstdefaultroutewillbeinstalledintotheroutingtable.

Thefirstdefaultroutecannotbeinstalledintotheroutingtableunlesstheadministratormanuallydisablestheseconddefaultroutewiththenoiproute0.0.0.00.0.0.0172.16.1.1command.

Refertotheexhibit.Acompanyhasrecentlyinstalledanewswitch（S2）intotheirnetwork.Afterseveralminutes,thenetworkadministratornoticesthatthenewVLANinformationisnotbeingpropagatedtothenewswitch.Giventheshowvtpstatuscommandoutput,whatisthepossibleproblemthatpreventstheinformationfrombeingreceivedbythenewswitch?

VTPversionmismatch

VTPdomainnamemismatch

VTPrevisionnumbermismatch

timesynchronizationproblems

Refertotheexhibit.AssumingthatallthreeroutersareconfiguredwiththeEIGRProutingprotocolandsharinginformation,whatinformationcanbegatheredfromtheshowcommandoutput?

RouterBhasEIGRPadjacencieswithbothrouterAandC.

RouterBhasafullyconvergedtopologytable.

RouterBhasnotformedanadjacencywithrouterA.

RouterBhasnotformedanadjacencywithrouterC.

IfanauthenticationprotocolisconfiguredforPPPoperation,whenistheclientoruserworkstationauthenticated?

priortolinkestablishment

duringthelinkestablishmentphase

beforethenetworklayerprotocolconfigurationbegins

afterthenetworklayerprotocolconfigurationhasended

WhichstatementistrueaboutthedifferencebetweenCHAPandPAPinPPPauthentication?

PAPandCHAPprovideequivalentprotectionagainstreplayattacks.

PAPsendsthepasswordencryptedandCHAPdoesnotsendthepasswordatall.

PAPusesatwo-wayhandshakemethodandCHAPusesathree-wayhandshakemethod.

PAPsendsthepasswordonceandCHAPsendsthepasswordrepeatedlyuntilacknowledgementofauthenticationisreceived.

WhatshouldbeconsideredwhendesigninganaddressingschemethatusesprivateIPaddressspace?

PrivateIPaddressesaregloballyroutable.

Addresssummarizationisnotrecommended.

Hierarchicaldesignprinciplesshouldbeutilized.

Discontiguousnetworksarenolongerproblematic.

Anadministratorisconfiguringanewroutertopermitout-of-bandmanagementaccess.Whichsetofcommandswillallowtherequiredloginusingapasswordofcisco?

Router（config）#linevty04

Router（config-line）#passwordmanage

Router（config-line）#exit

Router（config）#enablepasswordcisco

Router（config）#linevty04

Router（config-line）#passwordcisco

Router（config-line）#login

Router（config）#lineconsole0

Router（config-line）#passwordcisco

Router（config-line）#login

Router（config）#lineconsole0

Router（config-line）#passwordcisco

Router（config-line）#exit

Router（config）#servicepassword-encryption

InorderforaVLANtobecreatedonaswitch,whatconfigurationparameterisrequired?

VTPdomainname

VLANnumber

VLANIPaddress

VLANdatabasename

Refertotheexhibit.AnetworkadministratorisconfiguringR1tosendasummaryroutetoR2.WhichstatementwouldincludeonlythefourEthernetnetworksinonesummarizationroute?

Router（config-if）#ipsummary-addresseigrp1172.31.0.0255.255.0.0

Router（config-if）#ipsummary-addresseigrp1172.31.0.0255.255.248.0

Router（config-if）#ipsummary-addresseigrp1172.31.0.0255.255.252.0

Router（config-if）#ipsummary-addresseigrp1172.31.0.0255.255.255.0

Router（config-if）#ipsummary-addresseigrp1172.31.0.0255.255.255.248

Router（config-if）#ipsummary-addresseigrp1172.31.0.0255.255.255.252

Refertotheexhibit.WhatisthelowestcostOSPFpathfortrafficthatissourcedfromH2anddestinedforH3?

R3toR5

R3toR2toR5

R3toR4toR5

R3toR2toR1toR5

Refertotheexhibit.AnetworkadministratorwantstoblockTelnetsessionsfromhostBtohostsEandF.WhereshouldACL110beplacediftheadministratorfollowsCiscobestpractices?

ontheFa0/0interfaceofR1inbound

ontheS0/0/0interfaceofR1inbound

ontheS0/0/0interfaceofR3outbound

ontheFa0/0interfaceofR3inbound

AcompanyistryingtodecidewhethertouseaPVCoranSVCforthecompanyWANconnection.WhichstatementbestdescribesabenefitofusingaPVC?

APVCisdynamicallyestablishedbetweentwopointswhenarouterrequestsatransmission.

APVCeliminatestheneedforcallsetupandclearingforeachtransmissionsession.

APVCisbestsuitedforsmallcompanieswithsporadicdataflows.

APVCdoesnotrequirepreconfigurationbyaserviceprovider.

Refertotheexhibit.AllroutersareconfiguredtousetheEIGRProutingprotocol,andthenetworkadministratorhasconfiguredtheserialinterface