WhichthreestatementsdescribethedifferencesbetweenRIPversion1andRIPversion2？（Choosethree.)（）
A. RIPversion1broadcastsupdateswhereasRIPversion2usesmulticasts.
B. RIPversion1multicastsupdateswhileRIPversion2usesbroadcasts.
C. BothRIPversion1andRIPversion2areclasslessroutingprotocols.
D. RIPVersion2isaclasslessroutingprotocolwhereasRIPversion1isaclassfulroutingprotocol.
E. BothRIPversion1andversion2supportauthentication.
F. RIPversion2sendsthesubnetmaskinupdatesandRIPversion1doesnot.
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Whatisthepurposeofthecommandshownbelow？vtppasswordFl0r1da（）。
A. ItisusedtovalidatethesourcesofVTPadvertisementssentbetweenswitches.
B. ItisusedtoaccesstheVTPservertomakechangestotheVTPconfiguration.
C. ItallowstwoVTPserverstoexistinthesamedomain，eachconfiguredwithdifferentpasswords.
D. ItisthepasswordrequiredwhenpromotingaswitchfromVTPclientmodetoVTPservermode.
E. ItisusedtopreventaswitchnewlyaddedtothenetworkfromsendingincorrectVLANinformationtotheotherswitchesinthedomain.
稀释与接种法测定水中BOD5时，下列废水中应进行接种的是：（）
A. 有机物含量较多的废水
B. 较清洁的河水
C. 不含或含少量微生物的工业废水
D. 生活污水
WhichstatementsdescribetheroutingprotocolOSPF？（）
A. ItsupportsVLSM.
B. Itisusedtoroutebetweenautonomoussystems.
C. Itconfinesnetworkinstabilitytooneareaofthenetwork.
D. Itincreasesroutingoverheadonthenetwork.
E. Itallowsextensivecontrolofroutingupdates.
F. ItissimplertoconfigurethanRIPv2.
ForwhattwopurposesdoestheEthernetprotocolusephysicaladdresses？（）
A. touniquelyidentifydevicesatLayer2
B. toallowcommunicationwithdevicesonadifferentnetwork
C. todifferentiateaLayer2framefromaLayer3packet
D. toestablishaprioritysystemtodeterminewhichdevicegetstotransmitfirst
E. toallowcommunicationbetweendifferentdevicesonthesamenetwork
F. toallowdetectionofaremotedevicewhenitsphysicaladdressisunknown
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