思科第五章答案.doc

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1、1窗体顶端WhenthedestinationnetworkisnotlistedintheroutingtableofaCiscorouter,whataretwopossibleactionsthattheroutermighttake?(Choosetwo.)TheroutersendsanARPrequesttodeterminetherequirednexthopaddress.Therouterdiscardsthepacket.TherouterforwardsthepackettowardthenexthopindicatedintheA

2、RPtable.Therouterforwardsthepackettotheinterfaceindicatedbythesourceaddress.Therouterforwardsthepacketouttheinterfaceindicatedbythedefaultrouteentry.窗体底端2窗体顶端Whatarethekeyfactorstoconsiderwhengroupinghostsintoacommonnetwork?(Choosethree.)gatewayspurposephysicaladdressingsoftwarev

3、ersiongeographiclocationownership窗体底端3窗体顶端InanIPv4environment,whatinformationisusedbytheroutertoforwarddatapacketsfromoneinterfaceofaroutertoanother?destinationnetworkaddresssourcenetworkaddresssourceMACaddresswellknownportdestinationaddress窗体底端4窗体顶端Whatarethreecommonproblemswith

4、alargenetwork?(Choosethree.)toofewbroadcastsperformancedegradationsecurityissueslimitedmanagementresponsibilityhostidentificationprotocolcompatibility窗体底端5窗体顶端Whichportionofthenetworklayeraddressdoesarouterusetoforwardpackets?hostportionbroadcastaddressnetworkportiongatewayaddres

5、s窗体底端6窗体顶端Refertotheexhibit.Usingthenetworkintheexhibit,whatwouldbethedefaultgatewayaddressforhostAinthe192.133.219.0network?192.135.250.1192.31.7.1192.133.219.0192.133.219.1窗体底端7窗体顶端Ifthedefaultgatewayisconfiguredincorrectlyonthehost,whatistheimpactoncommunications?Thehostisunab

6、letocommunicateonthelocalnetwork.Thehostcancommunicatewithotherhostsonthelocalnetwork,butisunabletocommunicatewithhostsonremotenetworks.Thehostcancommunicatewithotherhostsonremotenetworks,butisunabletocommunicatewithhostsonthelocalnetwork.Thereisnoimpactoncommunications.窗体底端8窗体顶端

7、Whatisthepurposeofadefaultgateway?physicallyconnectsacomputertoanetworkprovidesapermanentaddresstoacomputeridentifiesthenetworktowhichacomputerisconnectedidentifiesthelogicaladdressofanetworkedcomputeranduniquelyidentifiesittotherestofthenetworkidentifiesthedevicethatallowslocaln

8、etworkcomputerstocommunicatewithdeviceso