2012ccna题库9-10

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1、1.Cisco-Chapter91Convertthebinarynumber10111010intoitshexadecimalequivalent.Selectthecorrectanswerfromthelistbelow.8590BAA1B31C2WhenacollisionoccursinanetworkusingCSMA/CD,howdohostswithdatatotransmitrespondafterthebackoffperiodhasexpired?Thehostsreturnt

2、oalisten-before-transmitmode.Thehostscreatingthecollisionhaveprioritytosenddata.Thehostscreatingthecollisionretransmitthelast16frames.Thehostsextendtheirdelayperiodtoallowforrapidtransmission.3Whichofthefollowingdescribeinterframespacing?(Choosetwo.)the

3、minimuminterval,measuredinbit-times,thatanystationmustwaitbeforesendinganotherframethemaximuminterval,measuredinbit-times,thatanystationmustwaitbeforesendinganotherframethe96-bitpayloadpaddinginsertedintoaframetoachievealegalframesizethe96-bitframepaddi

4、ngtransmittedbetweenframestoachievepropersynchronizationthetimeallowedforslowstationstoprocessaframeandprepareforthenextframethemaximumintervalwithinwhichastationmustsendanotherframetoavoidbeingconsideredunreachable4EthernetoperatesatwhichlayersoftheOSI

5、model?(Choosetwo.)NetworklayerTransportlayerPhysicallayerApplicationlayerSessionlayerData-linklayer5Inthegraphic,HostAhasreached50%completioninsendinga1KBEthernetframetoHostDwhenHostBwishestotransmititsownframetoHostC.WhatmustHostBdo?HostBcantransmitimm

6、ediatelysinceitisconnectedonitsowncablesegment.HostBmustwaittoreceiveaCSMAtransmissionfromthehub,tosignalitsturn.HostBmustsendarequestsignaltoHostAbytransmittinganinterframegap.HostBmustwaituntilitiscertainthatHostAhascompletedsendingitsframe.6Whatdoest

7、heIEEE802.2standardrepresentinEthernettechnologies?MACsublayerPhysicallayerLogicalLinkControlsublayerNetworklayer7Refertotheexhibit.Host_AisattemptingtocontactServer_B.WhichstatementscorrectlydescribetheaddressingHost_Awillgenerateintheprocess?(Choosetw

8、o.)ApacketwiththedestinationIPofRouter_B.AframewiththedestinationMACaddressofSwitch_A.ApacketwiththedestinationIPofRouter_A.AframewiththedestinationMACaddressofRouter_A.ApacketwiththedestinationIPofServer_B.Aframewiththedestinati