WhichstatementsdescribetheroutingprotocolOSPF？（）
A. ItsupportsVLSM.
B. Itisusedtoroutebetweenautonomoussystems.
C. Itconfinesnetworkinstabilitytooneareaofthenetwork.
D. Itincreasesroutingoverheadonthenetwork.
E. Itallowsextensivecontrolofroutingupdates.
F. ItissimplertoconfigurethanRIPv2.
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ForwhattwopurposesdoestheEthernetprotocolusephysicaladdresses？（）
A. touniquelyidentifydevicesatLayer2
B. toallowcommunicationwithdevicesonadifferentnetwork
C. todifferentiateaLayer2framefromaLayer3packet
D. toestablishaprioritysystemtodeterminewhichdevicegetstotransmitfirst
E. toallowcommunicationbetweendifferentdevicesonthesamenetwork
F. toallowdetectionofaremotedevicewhenitsphysicaladdressisunknown
WhichthreeapproachescanbeusedwhilemigratingfromanIPV4addressingschemetoanIPV6scheme？（）
A. staticallymapIPV4addresstoIPV6addresses
B. configurationIPv4tunnelsbetweenIPV6islands
C. useDHCPv6tomapIPV4addressestoIPV6addresses
D. useproxyingandtranslationtotranslateIPV6packetsintoIPV4packets
E. configureIPV6directly
F. enabledual-stackrouting
Whatinformationdoesarouterrunningalink-stateprotocolusetobuildandmaintainitstopologicaldatabase？（）
A. hellopackets
B. SAPmessagessentbyotherrouters
C. LSAsfromotherrouters
D. beaconsreceivedonpoint-to-pointlinks
E. routingtablesreceivedfromotherlink-staterouters
F. TTLpacketsfromdesignatedrouters
下列哪些是散列函数（）
A. MD5
B. RSA
C. HMAC
D. SHA-1
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