ccna第三学期英文答案chapter

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1、1窗体顶端Refertotheexhibit.AllswitchesinthenetworkhaveemptyMACtables.STPhasbeendisabledontheswitchesinthenetwork.HowwillabroadcastframethatissentbyhostPC1behandledonthenetwork?SwitchSW1willblockthebroadcastanddroptheframe.SwitchSW1willforwardthebroadcastoutallswitchports,exce

2、pttheoriginatingport.Thiswillgenerateanendlessloopinthenetwork.SwitchSW1willforwardthebroadcastoutallswitchports,excepttheoriginatingport.AllhostsinthenetworkwillreplaywithaunicastframesenttohostPC1.SwitchSW1willforwardthetrafficoutallswitchportsexcepttheoriginatingportas

3、aunicastframe.AllhostsinthenetworkwillreplaywithaunicastframesenttoswitchSW1.窗体底端2窗体顶端Refertotheexhibit.ServersendsanARPrequestfortheMACaddressofitsdefaultgateway.IfSTPisnotenabled,whatwillbetheresultofthisARPrequest?Router_1willdropthebroadcastandreplywiththeMACaddressof

4、thenexthoprouter.Switch_AwillreplywiththeMACaddressoftheRouter_1E0interface.Switch_AandSwitch_Bwillcontinuouslyfloodthemessageontothenetwork.ThemessagewillcyclearoundthenetworkuntilitsTTLisexceeded.窗体底端3窗体顶端Whattwoelementswillexistinaconvergednetworkwithonespanningtree?(C

5、hoosetwo.)onerootbridgepernetworkallnon-designatedportsforwardingonerootportpernon-rootbridgemultipledesignatedportspersegmentonedesignatedportpernetwork窗体底端4窗体顶端Whichtwocriteriadoesaswitchusetoselecttherootbridge?(Choosetwo.)bridgepriorityswitchingspeednumberofportsbaseM

6、ACaddressswitchlocationmemorysize窗体底端5窗体顶端InwhichtwowaysistheinformationthatiscontainedinBPDUsusedbyswitches?(Choosetwo.)tonegotiateatrunkbetweenswitchestosettheduplexmodeofaredundantlinktoidentifytheshortestpathtotherootbridgetopreventloopsbysharingbridgingtablesbetweenc

7、onnectedswitchestodeterminewhichportswillforwardframesaspartofthespanningtree窗体底端6窗体顶端WhichtwostatementsdescribetheBIDsusedinaspanningtreetopology?(Choosetwo.)TheyaresentoutbytherootbridgeonlyaftertheinferiorBPDUsaresent.TheyconsistofabridgepriorityandMACaddress.Onlythero

8、otbridgewillsendoutaBID.Theyareusedbytheswitchesinaspanningtreetopologytoelecttherootbridge.Thes