CCNA Exploration 4 Accessing the WAN Chapter 8

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1、CCNAExploration4AccessingtheWANChapter81Whichtwostatementsaretrueconcerninglogicalnetworkingmodels?(Choosetwo.)26TCP/IPsplitsthelowestlayeroftheOSImodelintotwoseparatelayers.ThetoplayeroftheTCP/IPmodelcombinesthefunctionsofthetopthreeOSIlayers.TroubleshootingwiththeTCP/IPmodelreq

2、uiresdifferenttechniquesthanwiththeOSImodel.ThenetworkaccesslayerisresponsibleforexchangingpacketsbetweendevicesonaTCP/IPnetwork.TheInternetlayerprovidescommunicationbetweenapplications,suchasFTP,HTTP,andSMTPonseparatehosts.TheTCP/IPnetworkaccesslayercorrespondstotheOSIphysicalan

3、ddatalinklayers.2Excessivebroadcastsaregenerallyasymptomofaproblematwhichlayer?2physicaldatalinknetworktransport3InformationaboutwhichOSIlayersofconnectedCiscodevicescanbeverifiedwiththeshowcdpneighborscommand?2AlllayersLayer1,Layer2,andLayer3Layer1,Layer2,Layer3,andLayer4Layer6a

4、ndLayer74Usersarecomplainingofverylongwaittimestoaccessresourcesonthenetwork.Theshowinterfacecommandrevealscollisioncountsfarabovethenetworkbaseline.AtwhichOSIlayershouldtheadministratorbegintroubleshooting?5applicationtransportnetworkdatalinkphysical5Refertotheexhibit.UsersatBra

5、nchBarereportingtroubleaccessingacorporatewebsiterunningonaserverthatislocatedatHQ.HQandBranchAuserscanaccessthewebsite.R3isabletoping10.10.10.1successfullybutnot10.10.10.2.TheusersatBranchBcanaccessserversatBranchA.Whichtwostatementsaretrueaboutthetroubleshootingefforts?(Chooset

6、wo.)24Thewebservershouldbetestedforanapplicationlayerproblem.FrameRelayatR3andR2shouldbetestedtonarrowthescopeoftheproblem.ThefactthatusersatBranchAareworkingnormallyprovesthatthereisnoproblematR2.AnACLentryerrorcouldcausethefailureatLayer4ineitherR3orR2.ThesuccessfulpingfromR3to

7、R1provesthattheWANisfunctioningnormally.Therefore,theproblemhastobeintheupperlayers.6Whichtwopiecesofinformationaretypicallyfoundonalogicalnetworkdiagram?(Choosetwo.)34cabletypesconnectortypesinterfaceidentifiersDLCIforvirtualcircuitsoperatingsystemversions7Atechnicianhasbeenaske

8、dtotroubleshootanexistingswitchednetwork