CCNA 2 Final Exam Answers V31.docx

CCNA 2 Final Exam Answers V31.docx

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CCNA2FinalExamAnswersV31

1.WhataretwopossiblereasonsarouterwouldnotloadavalidIOSfromflash?

（Choosetwo.）

Theconfigurationregisterissetto0×2142.

Thefirstbootsystemcommandexecutedinthestartupconfigurationfileisbootsystemrom.

Theconfigurationregisterissetto0×2100.

Thebootfieldissettothehexadecimalnumber2.

Thestartupconfigurationfileismissingorcorrupt.

2.Whataretworecommendedusesofloginbanners?

（Choosetwo.）

todisplaysecuritywarningmessages

towelcomeanyusertotherouter

towarnpeopleaboutmisusingprivilegedEXECmode

toidentifycircuitsandotherdevicesconnectedtotherouter

toannounceascheduledsystemshutdown

3.

RouterAandRouterBhavebeencorrectlyconfiguredtouseRIPasadynamicroutingprotocolandallintefacesonRouterAandRouterBarereporting"interfaceisup,lineprotocolisup"status.RIPisthenconfiguredonRouterCusingthefollowingcommands:

RouterC（config）#routerrip

RouterC（config-router）#network192.168.4.0

RouterC（config-router）#network172.16.0.0

IfnoadditionalroutingisconfiguredonRouterA,RouterB,andRouterC,whatwillbetheresult?

Networks192.168.12.0/24,192.168.4.0/24,and172.16.0.0/16willbeunreachablefromRouterA.

RouterAwillhavenoknowledgeofnetwork192.168.12.0/24,butwillhaveroutestonetworks192.168.4.0/24and172.16.0.0/16.

AllnetworksshowninthegraphicwillbereachablebyRouterA,RouterB,andRouterC.

Networks192.168.4.0/24and172.16.0.0/16willbeunreachablefromRouterAandRouterB.

4.Whataretheprimaryfunctionsofarouter?

（Choosetwo.）

determinethebestpathforpackets

preventcollisionsonthenetworkLAN

regulateflowcontrolbetweensenderandreceiver

providedomainnameresolution

forwardpacketstotheappropriateinterface

5.Whataresomereasonstochangetheconfigurationregistersetting?

（Choosetwo.）

toforcethesystemtoignoretheconfigurationfilestoredinNVRAM

tomonitorpasswordchanges

tochangethePOSTsequence

toforcetheroutertoboottheIOSfromNVRAM

toforcethesystemintoROMmonitormode

6.Anetworkadministratorissuestheerasestartup-configcommandonaconfiguredrouterwiththeconfigurationregistersetto0×2102andobservesthefollowingoutput:

Erasingthenvramfilesystemwillremoveallfiles!

Continue?

[Confirm]

[OK]

Eraseofnvram:

complete

Iftherouterunexpectedlylosespowerafterthissequence,whatwilloccurwhenpowerisrestored?

TherouterwillenterROMmonitormodeuponcompletionofthepower-onselftest（POST）.

Therouterwillloadthelastknownvalidconfigurationfile.

TherouterwillenterRx-bootmode.

Therouterwillprompttheusertoentersetupmodeortocontinuewithoutenteringsetupmode.

7.Whyareroutedprotocolsimportanttonetworking?

（Choosetwo.）

Routedprotocolsdetectcollisionsandfragments.

Routersuseroutedprotocolstocalculatethebestpathtoadestination.

Routedprotocolstransportdataacrossthenetwork.

Thefieldsandformatsusedwithinapacketaredefinedbyroutedprotocols.

Routedprotocolsareusedtoconfigurethemetricsusedbyroutingprotocols.

8.ThemainrouterofXYZcompanyhasenoughflashandRAMtostoremultipleIOSimages.AnadministratorwantstouploadasecondIOSimagefromaTFTPservertotheflashoftherouter.Whichmethodwillaccomplishthistask?

PastetheIOSfilenametothecommandlineoftherouterwhileinglobalconfigurationmode.Pressenter.Thenissuethecopytftpflashcommand.

Usethesetuputilitytoloadthenewimagetoflash.

CopytheIOSimagefilefromaTFTPserverusingthecommandcopyfilenameipaddressflash.

CopytheIOSimagefilefromaTFTPserverusingthecommandcopytftpflash.Whenprompted,providetheIPaddressornameoftheTFTPserverandtheIOSimagefilename.

9.

AnetworkadministratorhasaconsoleconnectiontotheFremantlerouter.PingstoMelvillearesuccessful,butpingstoCottesloeandNedlandsfail.Whatcouldbeafirststepintroubleshootingtheproblem?

UseanextendedpingfromFremantletoeachrouterinthenetwork.

UsetheshowinterfacescommandfromaTelnetsessiononMelvilletochecktheconnectiontoCottesloe.

Usethetraceroutecommandtodiscoverexactlywhichlinkinthenetworkisdown.

UsetheshowcdpneighborsdetailcommandfromFremantletogatherinformationaboutallCiscoroutersinthenetwork.

10.

Refertotheexhibit.ThenewsecuritypolicyforthecompanyallowsallIPtrafficfromtheEngineeringLANtotheInternetwhileonlywebtrafficfromtheMarketingLANisallowedtotheInternet.WhichACLcanbeappliedintheoutbounddirectionofSerial0/1ontheMarketingroutertoimplementthenewsecuritypolicy?

access-list197permitip192.0.2.00.0.0.255any

access-list197permitip198.18.112.00.0.0.255anyeqwww

access-list165permitip192.0.2.00.0.0.255any

access-list165permittcp198.18.112.00.0.0.255anyeqwww

access-list165permitipanyany

access-list137permitip192.0.2.00.0.0.255any

access-list137permittcp198.18.112.00.0.0.255anyeqwww

access-list89permit192.0.2.00.0.0.255any

access-list89permittcp198.18.112.00.0.0.255anyeqwww

11.

HostsfromtheLimerickLANarenotallowedaccesstotheShannonLANbutshouldbeabletoaccesstheInternet.WhichsetofcommandswillcreateastandardACLthatwillapplytotrafficontheShannonrouterinterfaceFa0/0implementingthissecurity?

access-list42deny172.19.123.00.0.0.255192.0.2.00.0.0.255

access-list42permitany

access-list56deny172.19.123.00.0.0.255

access-list56permitany

access-list61deny172.19.123.00.0.0.0

access-list61permitany

access-list87denyipany192.0.2.00.0.0.255

access-list87permitipany

12.WhichofthefollowingcommandswillcorrectlyconfigureanextendedACL?

（Choosetwo）.

Router（config）#access-list18permittcphost192.168.73.3eq25

Router（config）#access-list102permittcp10.43.0.00.0.255.255anyeq80

Router（config）#access-list187permittcphost192.168.42.34172.29.0.00.0.255.255eq23

Router（config）#access-list99permithost10.217.32.3

Router（config）#access-list128permittcphost192.168.100.31eq23

13.Whataretheresultsofsettingthebootfieldbitsintheconfigurationregisterto"0000"?

（Choosetwo.）

Thestartup-configfilewillbeignoredatbootup.

TherouterwillloadtheIOSfromFlash.

TherouterwillenterROMmonitormodeuponreload.

TherouterwillenterbootROMmodeandhavelimitedcapabilities.

TheadministratorcanenterthebcommandtomanuallyboottheIOS.

14.

Refertotheexhibit.RouterDinterfaceS0onhasgonedown.WhatisthemaximumtimethatwillelapsebeforeRouterAlearnsthatnetwork168.58.14.0isdown?

5seconds

13seconds

17seconds

25seconds

30seconds

77seconds

15.Duringinitialrouterbootupthefollowinglineappears:

"NVRAMinvalid,possiblyduetowriteerase."

Whataretwopossiblereasonsforthisresult?

（Choosetwo.）

Thestartup-configfilewasnotsavedtoRAMbeforereboot.

TheIOShasbeenerased.

Therouterhasnotbeenconfigured.

Thestartup-configfilecannotbelocated.

Therouterwillnotenterinitialconfigurationdialog.

16.

TheSuffolkrouterisdirectlyconnectedtothenetworksshowninthegraphicandhasadefaultroutethatpointstotheRichmondrouter.Allinterfacesareactiveandproperlyaddressed.However,whentheworkstationonnetwork172.29.5.0/24sendsapackettodestinationaddress172.29.198.5,itisdiscardedbytheSuffolkrouter.Whatcanbeareasonforthisresult?

TheipclasslesscommandisnotenabledontheRichmondrouter.

TheroutewasignorediftheRichmondrouterdidnotincludethe172.29.198.0/24networkinitsroutingupdates.

TheRichmondrouterisinadifferentautonomoussystemthantheSuffolkrouter.

Theipsubnet-zerocommandwasnotconfiguredontheSuffolkrouter.

TheipclasslesscommandisnotenabledontheSuffolkrouter.

17.access-list199denytcp178.15.0.00.0.255.255anyeq23

access-list199permitipanyany

AssumingthisACLiscorrectlyappliedtoarouterinterface,whichstatementsdescribetrafficonthenetwork?

（Choosetwo.）

AllFTPtrafficfromnetwork178.15.0.0willbepermitted.

AllTelnettrafficdestinedfornetwork178.15.0.0willbedenied.

TelnetandFTPwillbepermittedfromallhostsonnetwork178.15.0.0toanydestination.

Telnetwillnotbepermittedfromanyhostsonnetwork178.15.0.0toanydestination.

Telnetwillnotbepermittedtoanyhostonnetwork178.15.0.0fromanydestination.

18.

Whatfactscanbedeterminedfromthehighlightedtextshownintheexhibit?

（Choosetwo.）

Aweakencryptionwasappliedtoallunencryptedpasswords.

Theenablepasswordisnowmoresecurethantheenablesecretpassword.

AnMD5hashingalgorithmwasusedonallencryptedpasswords.

AnyconfigureduserEXECmodeorTelnetpasswordswillbeencryptedinthisconfiguration.

Theservicepassword-encryptioncommandwasusedtoencryptallpasswordsontherouterincludingenablesecret.

19.WhatarethreefeaturesofCDP?

（Choosethree.）

providesinformationondirectlyconnecteddevicesthathaveCDPenabled

testsLayer2connectivity

enabledbydefaultoneachinterface

providesalayerofsecurity

usedfordebuggingLayer4connectivityissues

20.Whatinformationcanbelearnedduringtheinitialrouterbootup?

（Choosetwo.）

theconfigurationregistervalue

thenumberandtypesofinterfacesinstalled

theroutermodelandtheamountofmemorythatisavailable

theamountofmemoryrequiredtoloadtheIOSandconfiguration

thenumberofinterfaceswithconnectedcabl