WhatkindofpacketsdoesOSPFsendtokeepupconnectivitywithitsneighboringrouters?（）
A. SPFpackets
B. hellopackets
C. keepalivepackets
D. deadintervalpackets
E. LSUpackets
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Whichtwostatementsaretrueabouttherendezvouspoint(RP)inamulticastnetwork?（）
A. ThemulticastsourcesmustregisterwiththeRPtoformthemulticastdistributiontree
B. AnRPisrequiredonlyinnetworksrunningProtocolIndependentMulticastdensemode(PIMDM)
C. ThemulticastreceiversmustregisterwiththeRPtoformthemulticastdistributiontree
D. AnRPisrequiredonlyinnetworksrunningProtocolIndependentMulticastsparsemode(PIMSM)
E. AnRPisrequiredonlyinnetworksrunningProtocolIndependentMulticastsparse-densemode(PIM-SDM)
F. Toformthemulticastdistributiontree,themulticastsourcesregisterwithandthereceiversjointheRP
YouarethenetworkadministratorforTestKing.Thenetworkconsistsofasingle ActiveDirectorydomain.AllnetworkserversrunWindowsServer2003andall clientcomputersrunWindowsXPProfessional. TerminalServicesisinstalledonamemberservernamedTestking1.Currently,30 activeterminalserversessionsareconnectedtoTestking1.Anunforeseenhardware upgradewillrequireshuttingdowntheserver. Youneedtoprovideatwo-minutewarningabouttheshutdowntoallactive terminalsessions. First,youlogontoTestking1asanadministrator. Whatshouldyoudonext?（）
A. Fromacommandprompt,runthetsdisconncommand.
B. Fromacommandprompt,runthenetsend/userscommandtosendawarningmessage.Aftertwominutes,manuallyshutdownTestking1.
C. Fromacommandprompt,runthetsshutdn120/server:Testking1command.
D. RunTsadmin.exetodisconnectallactivesessions.Aftertwominutes,manuallyshutdownTestking1.
Whichtwomulticastprotocolstatementsaretrue?（）
A. Sparsemodemulticastusesapullmodeltosendmulticasttraffictowhereitisrequested
B. Densemodemulticastusesapushmodeltofloodtrafficthroughoutthenetworkandthenprunestheunwantedtraffic
C. Densemodemulticastrequiresexplicitjoinmessagesfromtheirmembers
D. Sparsemodeusesreversepathforwarding(RPF)topruneoffredundantflows
E. Theprimaryuseofsparsemodemulticastisfortestlabsandrouterperformancetesting
按照工程造价的第一种含义，工程造价是指（）
A. 建设项目总投资
B. 建设项目固定资产投资
C. 建设工程投资
D. 建筑安裝工程投资
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