题目内容

ForwhattwopurposesdoestheEthernetprotocolusephysicaladdresses？（）

A. touniquelyidentifydevicesatLayer2
B. toallowcommunicationwithdevicesonadifferentnetwork
C. todifferentiateaLayer2framefromaLayer3packet
D. toestablishaprioritysystemtodeterminewhichdevicegetstotransmitfirst
E. toallowcommunicationbetweendifferentdevicesonthesamenetwork
F. toallowdetectionofaremotedevicewhenitsphysicaladdressisunknown

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WhichthreeapproachescanbeusedwhilemigratingfromanIPV4addressingschemetoanIPV6scheme？（）

A. staticallymapIPV4addresstoIPV6addresses
B. configurationIPv4tunnelsbetweenIPV6islands
C. useDHCPv6tomapIPV4addressestoIPV6addresses
D. useproxyingandtranslationtotranslateIPV6packetsintoIPV4packets
E. configureIPV6directly
F. enabledual-stackrouting

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Whatinformationdoesarouterrunningalink-stateprotocolusetobuildandmaintainitstopologicaldatabase？（）

A. hellopackets
B. SAPmessagessentbyotherrouters
C. LSAsfromotherrouters
D. beaconsreceivedonpoint-to-pointlinks
E. routingtablesreceivedfromotherlink-staterouters
F. TTLpacketsfromdesignatedrouters

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下列哪些是散列函数（）

A. MD5
B. RSA
C. HMAC
D. SHA-1

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AciscorouterisbootingandhasjustcompletedthePOSTprocess.Itisnowreadytofindandloadan IOS image.whatfunctiondoestherouterperformnext？（）

A. Itcheckstheconfigurationregister
B. ItattemptstobootfromaTFTPserver
C. Itloadsthefirstimagefileinflashmemory
D. ItinspectstheconfigurationfileinNVRAMforbootinstructions

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