CCNA网络工程师认证考试精华试题

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1.【单选题】6分|GivenanIPaddress172.16.28.252withasubnetmaskof255.255.240.0，whatisthecorrectnetworkaddres?

A172.16.16.0

B172.16.24.0

C172.16.0.0

D172.16.28.0

2.【多选题】7分|Whichthreeelementsmustbeusedwhenyouconfigurearouterinterfaceforvlantrunking?

AoneIPnetworkorsubnetworkforeachsubinterface

Bsubinterfaceencapsulationidentifiersthatmatchvlantags

Camanagementdomainforeachsubinterface

Donesubinterfacepervlan

3.【单选题】6分|Areceivinghostcomputesthechecksumonaframeanddeterminesthattheframeisdamaged.Theframeisthendiscarded.AtwhichOSIlayerdidthishappen?

Asession

Bnetwork

Cphysical

Ddatalink

4.【单选题】6分|Arouterreceivesinformationaboutnetwork192.168.10.0/24frommultiplesources.Whatwilltherouterconsiderthemostreliableinformationaboutthepathtothatnetwork?

AanOSPFupdatefornetwork192.168.0.0/16

Bastaticroutertonetwork192.168.10.0/24withalocalserialinterfaceconfiguredasthenexthop

CaRIPupdatefornetwork192.168.10.0/24

Dadirectlyconnectedinterfacewithanaddressof192.168.10.254/24

5.【单选题】6分|Whichstatementaboutvlanoperationonciscocatalystswitchesistrue?

Awhenapacketisreceivedfroman802.1Qtrunk，thevlanidcanbedeterminedfromthesourceMACaddresstable.

Bunkownunicastframesareretransmittedonlytotheportsthatbelongtothesamevlan

Cportsbetweenswitchesshouldbeconfiguredinaccessmodesothatvlanscanspanacrosstheports

Dbroadcastandmulticastframesareretransmittedtoportsthatareconfiguredondifferentvlan.

6.【多选题】7分|WhichtwostatementsdescribetheadvantagestotheuseofRIPovertheuseofOSPF?

ARIPrequireslesstimetoconverge

BRIPuseslessbandwidth

CRIPislesscomplextoconfigure

DRIPdemandsfewerrouterresources

7.【单选题】6分|TheenablesecretcommandisusedtosecureaccesstowhichCLImode?

AuserEXECmode

Bglobalconfigurationmode

CprivilegedEXECmode

Dauxiliarysetupmode

8.【单选题】6分|InwhichintegrationmethodisanIPV6packetencapsulatedwithinanIPV4protocol?

Aproxy

Bdual-stack

Ctunneling

Ddot1q

9.【多选题】7分|WhichcommandsarerequiredtoproperlyconfigurearoutertoproperlyconfigurearoutertorunOSPFandtoaddnetwork192.168.16.0/24toOSPFarea0?

ARouter（config）#routerospf1

BRouter（config）#routerospf0

CRouter（config）#routerospfarea0

DRouter（config-router）#network192.168.16.00.0.0.255area0

10.【单选题】6分|Assumingthedefaultswitchconfiguration，whichapproachshouldyouusetoconfiguretheextendedvlanrange（1006through4094）onaciscocatalyst3750seriesswitch?

AConfiguretheswitchtobeinVTPclientmode.

BConfiguretheswitchtobeinVTPdomaintmode.

CConfiguretheswitchtobeinVTPtransparentmode.

DConfiguretheswitchtobeinVTPv2.

11.【单选题】6分|Youareworkinginadatacenterenvironmentandareassignedtheaddressrange10.188.31.0/23.YouareaskedtodevelopanIPaddressingplantoallowthemaximumnumberofsubnetswithasmanyas30hostseach.WhichIPaddressrangemeetstheserequirements?

A10.188.31.0/27

B10.188.31.0/26

C10.188.31.0/29

D10.188.31.0/28

12.【单选题】6分|NCPWhichPPPsubprotocolnegotiatesauthenticationoptions?

ANCP

BLCP

CISDN

DDLCI

13.【多选题】7分|Whichtwocommandscanbeusedtoverifyatrunklinkconfigurationtstatusonagivenciscoswitch?

Ashowinterfacesinterface

Bshowinterfacesinterfacetrunk

Cshowinterfacesinterfaceswitchport

Dshowipinterfacebrief

14.【单选题】6分|Whichtermdescribesaspanning-treenetworkthathasallswitchportsineithertheblockingorforwardingstate?

Aredundant

Bspanned

Cprovisioned

Dconverged

15.【多选题】7分|Whichthreestatementsaccuratelydescribelayer2Ethernetswitches?

AMicrosegmentationdecreasesthenumberofcollisionsonthenetwork.

BInaproperlyfunctioningnetworkwithredundantswitchedpaths，eachswitchedaegmentwillcontainonerootbridgewithallitsportsintheforwardingstate.Allotherswitchesinthatbroadcastdomainwillhaveonlyonerootport.

CSwitchesthatareconfiguredwithvlansmakeforwardingdecisionsbasedonbothlayer2andlayer3addressinformation.

DSpann