ccna考试题库.docx

ccna考试题库.docx

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ccna考试题库

QUESTION101

Refertotheexhibit.TheswitchinthegraphichasadefaultconfigurationandtheMACtableisfullypopulated.Inaddition,thisnetworkisoperatingproperly.ThegraphicrepresentsselectedheaderinformationinaframeleavinghostA.Whatcanbeconcludedfromthisinformation

A.TheMACaddressofhostAis

B.TherouterwillforwardthepacketinthisframetotheInternet.

C.Theswitchwillonlyforwardthisframetotheattachedrouterinterface.

D.AlldevicesinthisLANexcepthostAwillpassthepackettoLayer3.

QUESTION102

Whatisanappropriateuseofadefaultroute

A.toprovideroutingtoalocalwebserver

B.toprovideroutingfromanISPtoastubnetwork

C.toprovideroutingthatwilloverridetheconfigureddynamicroutingprotocol

D.toprovideroutingtoadestinationthatisnotspecifiedintheroutingtableandwhichisoutsidethelocalnetwork

QUESTION103

Refertotheexhibit.Ajuniornetworkengineerhaspreparedtheexhibitedconfigurationfile.Whattwostatementsaretrueoftheplannedconfigurationforinterfacefa0/1（Choosetwo.）

A.ThetwoFastEthernetinterfaceswillrequireNATconfiguredontwooutsideserialinterfaces.

B.Addresstranslationonfa0/1isnotrequiredforDMZDevicestoaccesstheInternet.

C.Thefa0/1IPaddressoverlapswiththespaceusedbys0/0.

D.Thefa0/1IPaddressisinvalidfortheIPsubnetonwhichitresides.

E.InternethostsmaynotinitiateconnectionstoDMZDevicesthroughtheconfigurationthatisshown.

QUESTION104

Refertotheexhibit.Tworoutershavejustbeenconfiguredbyanewtechnician.Allinterfacesareup.However,theroutersarenotsharingtheirroutingtables.Whatistheproblem

A.SplithorizonispreventingRouter2fromreceivingroutinginformationfromRouter1.

B.Router1isconfiguredforRIPversion2,andRouter2isconfiguredforRIPversion1.

C.Router1hasanACLthatisblockingRIPversion2.

D.ThereisaphysicalconnectivityproblembetweenRouter1andRouter2.

E.Router1isusingauthenticationandRouter2isnot.

QUESTION105

Amedium-sizedcompanyhasaClassCIPaddress.IthastwoCiscoroutersandonenon-Ciscorouter.AllthreeroutersareusingRIPversion1.ThecompanynetworkisusingtheblockofThecompanyhasdecideditwouldbeagoodideatosplitthenetworkintothreesmallersubnetsandcreatetheoptionofconservingaddresseswithVLSM.Whatisthebestcourseofactionifthecompanywantstohave

40hostsineachofthethreesubnets

A.ConvertalltherouterstoEIGRPanduseand

asthenewsubnetworks.

B.MaintaintheuseofRIPversion1anduseandasthenewsubnetworks.

C.ConvertalltherouterstoEIGRPanduseandasthenewsubnetworks.

D.ConvertalltherouterstoRIPversion2anduseandasthenewsubnetworks.

E.ConvertalltherouterstoOSPFanduseand

asthenewsubnetworks.

F.Convertalltherouterstostaticroutesanduseand

QUESTION106

Refertotheexhibit.WhyhasthisswitchnotbeenelectedtherootbridgeforVLAN1

A.Ithasmorethanoneinterfacethatisconnectedtotherootnetworksegment.

B.ItisrunningRSTPwhiletheelectedrootbridgeisrunningspanningtree.

C.IthasahigherMACaddressthantheelectedrootbridge.

D.IthasahigherbridgeIDthantheelectedrootbridge.

QUESTION107

Refertotheexhibit.AttheendofanRSTPelectionprocess,whichaccesslayerswitchportwillassumethediscardingrole

A.Switch3,portfa0/1

B.Switch3,portfa0/12

C.Switch4,portfa0/11

D.Switch4,portfa0/2

E.Switch3,portGi0/1

F.Switch3,portGi0/2

QUESTION108

Refertotheexhibit.HowmanypathscantheEIGRProutingprocessusetoforwardpacketsfromHQ_Routertoaneighborrouter

A.twoequal-costpaths

B.twounequal-costpaths

C.threeequal-costpaths

D.threeunequal-costpaths

E.fourequal-costpaths

F.fourunequal-costpaths

QUESTION109

Selecttheactionthatresultsfromexecutingthesecommands.

Switch（config-if）#switchportport-security

Switch（config-if）#switchportport-securitymac-addresssticky

A.AdynamicallylearnedMACaddressissavedinthestartup-configurationfile.

B.AdynamicallylearnedMACaddressissavedintherunning-configurationfile.

C.AdynamicallylearnedMACaddressissavedintheVLANdatabase.

D.StaticallyconfiguredMACaddressesaresavedinthestartup-configurationfileifframesfromthataddressarereceived.

E.StaticallyconfiguredMACaddressesaresavedintherunning-configurationfileifframesfromthataddressarereceived.

QUESTION110

Refertotheexhibit.Thefollowingcommandsareexecutedoninterfacefa0/1of2950Switch.

2950Switch（config-if）#switchportport-security

2950Switch（config-if）#switchportport-securitymac-addresssticky

2950Switch（config-if）#switchportport-securitymaximum1

TheEthernetframethatisshownarrivesoninterfacefa0/1.Whattwofunctionswilloccurwhenthisframeisreceivedby2950Switch（Choosetwo.）

A.TheMACaddresstablewillnowhaveanadditionalentryoffa0/1

B.OnlyhostAwillbeallowedtotransmitframesonfa0/1.

C.Thisframewillbediscardedwhenitisreceivedby2950Switch.

D.Allframesarrivingon2950Switchwithadestinationofwillbeforwardedoutfa0/1.

E.HostsBandCmayforwardframesoutfa0/1butframesarrivingfromotherswitcheswillnotbeforwardedoutfa0/1.

F.OnlyframesfromsourcethefirstlearnedMACaddressof2950Switch,willbeforwardedoutfa0/1.

QUESTION111

Refertotheexhibit.Some2950seriesswitchesareconnectedtotheconferenceareaofthecorporateheadquartersnetwork.Theswitchesprovidetwotothreejacksperconferenceroomtohostlaptopconnectionsforemployeeswhovisittheheadquartersoffice.Whenlargegroupsofemployeescomefromotherlocations,thenetworkadministratoroftenfindsthathubshavebeenconnectedtowalljacksintheconferenceareaalthoughtheportsontheaccesslayerswitcheswerenotintendedtosupportmultipleworkstations.

Whatactioncouldthenetworkadministratortaketopreventaccessbymultiplelaptopsthroughasingleswitchportandstillleavetheswitchfunctionalforitsintendeduse

A.ConfigurestaticentriesintheswitchMACaddresstabletoincludetherangeofaddressesusedbyvisitingemployees.

B.ConfigureanACLtoallowonlyasingleMACaddresstoconnecttotheswitchatonetime.

C.Usethemac-address-table1globalconfigurationcommandtolimiteachporttoonesourceMACaddress.

D.ImplementPortSecurityonallinterfacesandusetheport-securitymaximum1commandtolimitportaccesstoasingleMACaddress.

E.ImplementPortSecurityonallinterfacesandusetheport-securitymac-addressstickycommandtolimitaccesstoasingleMACaddress.

F.ImplementPortSecurityatglobalconfigurationmodeandusetheport-securitymaximum1commandtoalloweachswitchonlyoneattachedhub.

QUESTION112

RunningbothIPv4andIPv6onaroutersimultaneouslyisknownaswhat

A.4to6routing

B.6to4routing

C.binaryrouting

D.dual-stackrouting

E.NextGenrouting

QUESTION113

WhatarethreeIPv6transitionmechanisms（Choosethree.）

A.6to4tunneling

B.VPNtunneling

C.GREtunneling

D.ISATAPtunneling

E.PPPtunneling

F.Teredotunneling

QUESTION114

IdentifythefourvalidIPv6addresses.（Choosefour.）

A.:

:

B.:

:

192:

168:

0:

1

C.2000:

:

D.2001:

3452:

4952:

2837:

:

E.2002:

c0a8:

101:

:

42

F.2003:

dead:

beef:

4dad:

23:

46:

bb:

101

QUESTION115

WhichprotocolshouldbeusedtoestablishasecureterminalconnectiontoaremotenetworkdeviceSelectthebestresponse.

A.ARP

B.SSH

C.Telnet

D.WEP

E.SNMPv1

F.SNMPv2

QUESTION116

Refertotheexhibit.AnetworkadministratorwantsSwitch3tobetherootbridge.WhatcouldbedonetoensureSwitch3willbetheroot

A.ConfiguretheIPaddressonSwitch3tobehigherthantheIPaddressesofSwitch1andSwitch2.

B.ConfigurethepriorityvalueonSwitch3tobehigherthanthepriorityvaluesofSwitch1andSwitch2.

C.ConfiguretheBIDonSwitch3tobelowerthantheBIDsofSwitch1andSwitch2.

D.ConfiguretheMACaddressonSwitch3tobehigherthantheSwitch1andSwitch2MACaddresses.

E.ConfigurealoopbackinterfaceonSwitch3withanIPaddresslowerthananyIPaddressonSwitch1andSwitch2.

QUESTION117

WhatisthemaximumdataratespecifiedforIEEEWLANs

A.10Mbps

B.11Mbps

C.54Mbps

D.100Mbps

QUESTION118

Howdoesusingtheservicepasswordencryptioncommandonarouterprovideadditionalsecurity

A.byencryptingallpasswordspassingthroughtherouter

B.byencryptingpasswordsintheplaintextconfigurationfile

C.byrequiringentryofencryptedpasswordsforaccesstothedevice

D.byconfiguringanMD5encryptedkeytobeusedbyroutingprotocolstovalidateroutingexchanges

E.byautomaticallysuggestingencryptedpasswordsforuseinconfiguringtherouter

QUESTION119

Refertotheexhibit.WhenrunningOSPF,WhatwouldcauserouterAnottoformanadjacencywithrouterB

A.Theloopbackaddressesareondifferentsubnets.

B.Thevalueofthedeadtimersontherouteraredifferent.

C.Routesummarizationisenabledonbothrouters.

D.TheprocessindentifieronrouterAisdifferentthantheprocessidentifieronrouterB.

QUESTION120

Refertotheexhibit.Whatstatementistrueoftheconfigurationforthisnetwork

A.Theconfigurationthatisshownprovidesinadequateoutsideaddressspacefortranslationofthenumberofinsideaddressesthataresupported.

B.BecauseoftheaddressingoninterfaceFastEthernet0/1,theSerial0/0interfaceaddresswillnotsupporttheNATconfigu