ccna practice certification exam # 1- ccna exploration accessing the wan (version 4.0)

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1、CCNAPracticeCertificationExam#1–CCNAExploration:AccessingtheWAN(Version4.0)1. WhatarethreeexamplesofTCP/IPapplicationlayerprotocols?(Choosethree.)aterminalemulationprotocolthatsupportsremoteconsoleconnectionswithvariousnetworkdevicesaprotocolcreatedbyIBMthatmakesiteasierf

2、ormainframestoconnecttoremoteofficesaprotocolresponsiblefortransportingelectronicmailonTCP/IPnetworksandtheInternetaprotocolthatcontrolstherateatwhichdataissenttoanothercomputeraprotocolthatexchangesnetworkmanagementinformationbetweenanetworkdeviceandamanagementconsoleapr

3、otocolthatconductsatestofthepaththroughwhichapackettravelsfromsourcetodestination2. Refertotheexhibit.TheexhibitshowssimplifiedprotocoldataunitsfromdifferentOSImodellayers.WhichthreestatementsaretrueaboutthePDUsandtheencapsulationprocess?(Choosethree.)PDU#1isaframe.PDU#2i

4、sanapplicationlayerPDUPDU#3isasegment.PDU#4isatransportlayerPDU.TheorderinwhichthesePDUsarecreatedduringtheencapsulationprocessis3,4,1,2.TheorderinwhichthesePDUsarecreatedduringtheencapsulationprocessis2,1,4,3.3. WhataretwocharacteristicsofTCP?(Choosetwo.)datatransportrel

5、iabilitybestpathdeterminationestablishing,maintaining,andterminatingvirtualcircuitsencapsulationofpacketsinadataframewithsourceanddestinationMACaddressesbest-effortdatagramdelivery4. Refertotheexhibit.WhattypeofLayer2encapsulationwillbeusedforconnectionDonthebasisofthisco

6、nfigurationonanewlyinstalledrouter:RtrA(config)# interfaceserial0/0/0RtrA(config-if)# ipaddress128.107.0.2255.255.255.252RtrA(config-if)# noshutdownEthernetFrameRelayHDLCPPP5. WhichthreefactorscontributetocongestiononanEthernetLAN?(Choosethree.)improperplacementofenterpri

7、selevelserversadditionofhoststoaphysicalsegmentreplacementofhubswithworkgroupswitchesincreasinguseofbandwidthintensivenetworkapplicationscreationofnewcollisiondomainswithoutfirstaddingnetworkhostsmigrationtofull-duplexEthernetwithintheLAN6. A CatalystswitchmustbeinwhichVT

8、PmodeinordertodeleteoraddVLANstoamanagementdomain?clientserverdomaintransparentdesignated7. What