CCNA 4 Chapter 3 v50 Exam Answers docxWord文件下载.docx
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CCNA 4 Chapter 3 v50 Exam Answers docxWord文件下载.docx
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byusingseparateNCPs*
bynegotiatingwiththenetworklayerhandler
3
Placetheoptionsinthefollowingorder:
Compression
Multilink
MaximumReceiveUnit
–notscored–
AuthenticationProtocol
4
Whichcommandcanbeusedtoviewthecabletypethatisattachedtoaserialinterface?
Router(config)#showcontrollers*
Router(config)#showipinterface
Router(config)#showinterfaces
Router(config)#showipinterfacebrief
5
InwhichsituationwouldtheuseofPAPbepreferabletotheuseofCHAP?
whenplaintextpasswordsareneededtosimulateloginattheremotehost*
whenrouterresourcesarelimited
whenmultilinkPPPisused
whenanetworkadministratorprefersitbecauseofeaseofconfiguration
6
WhichprotocolwillterminatethePPPlinkaftertheexchangeofdataiscomplete?
IPCP
LCP*
IPXCP
NCP
7
Refertotheexhibit.WhichstatementdescribesthestatusofthePPPconnection?
Boththelink-establishmentandnetwork-layerphasecompletedsuccessfully.*
Onlythenetwork-layerphasecompletedsuccessfully.
Onlythelink-establishmentphasecompletedsuccessfully.
Neitherthelink-establishmentphasenorthenetwork-layerphasecompletedsuccessfully.
8
WhichisanadvantageofusingPPPonaseriallinkinsteadofHDLC?
optionforsessionestablishment
higherspeedtransmission
optionforauthentication*
fixed-sizeframes
9
WhichthreestatementsaretrueaboutPPP?
(Choosethree.)
PPPcanusesynchronousandasynchronouscircuits.*
PPPcarriespacketsfromseveralnetworklayerprotocolsinLCPs.
PPPcanonlybeusedbetweentwoCiscodevices.
PPPusesLCPstoagreeonformatoptionssuchasauthentication,compression,anderrordetection.*
PPPusesLCPstoestablish,configure,andtestthedatalinkconnection.*
10
WhenconfiguringMultilinkPPP,whereistheIPaddressforthemultilinkbundleconfigured?
onasubinterface
onaphysicalserialinterface
onaphysicalEthernetinterface
onamultilinkinterface*
11
WhichfieldmarksthebeginningandendofanHDLCframe?
FCS
Flag*
Control
Data
12
Refertotheexhibit.Basedonthedebugcommandoutputthatisshown,whichstatementistrueoftheoperationofPPP.
BothPAPandCHAPauthenticationwereattempted.
APPPsessionwassuccessfullyestablished.*
CHAPauthenticationfailedbecauseofanunknownhostname.
ThedebugoutputisfromrouterR2.
13
DuringaPPPsessionestablishmentphase,whichtwomessagesaresentbytherequestedpartyiftheoptionsarenotacceptable?
(Choosetwo.)
Configure-Reject*
Code-Reject
Discard-Request
Configure-Nak*
Protocol-Reject
14
AnetworkadministratorisevaluatingauthenticationprotocolsforaPPPlink.WhichthreefactorsmightleadtotheselectionofCHAPoverPAPastheauthenticationprotocol?
usesanunpredictablevariablechallengevaluetopreventplaybackattacks*
usesathree-wayauthenticationperiodicallyduringthesessiontoreconfirmidentities*
transmitslogininformationinencryptedformat*
controlbytheremotehostofthefrequencyandtimingofloginevents
establishesidentitieswithatwo-wayhandshake
makesauthorizednetworkadministratorinterventionarequirementtoestablisheachsession
15
Step3
Step2
Step4
Step1
Step5
Step6
16
WhatarethreecomponentsofPPP?
multilink
NCP*
HDLC-likeframing*
compression
authentication
17
Refertotheexhibit.AnetworkadministratorisconfiguringthePPPlinkbetweenthetworouters.However,thePPPlinkcannotbeestablished.Basedonthepartialoutputoftheshowrunning-configcommand,whatisthecauseoftheproblem?
Thepasswordsdonotmatch.*
Theusernamesdonotmatch.
Thepasswordsshouldbelongerthan8characters.
TheinterfaceIPaddressesareindifferentsubnets.
18
WhichPPPoptioncandetectlinksthatareinalooped-backcondition?
MagicNumber*
Callback
MRU
ACCM
19
WhichthreearetypesofLCPframesusedwithPPP?
link-negotiationframes
link-acknowledgmentframes
link-maintenanceframes*
link-terminationframes*
link-establishmentframes*
link-controlframes
20
AtwhichlayeroftheOSImodeldoesmultiplexingtakeplace?
Layer3
Layer4
Layer2
Layer1*
21
Phase3
Phase1
Phase2
22
Whichthre
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