多项选择题
A.the table of 4096 elements that map the respective VLAN to STP instance number
B.VTP version
C.configuration revision number
D.native VLAN ID
单项选择题 Multicastisbeingdeployedinthenetwork，andonlyippimsparse-densemodehasbeenconfiguredonallinterfacesinthenetworktosupportanewvideostreamingapplication.Noothermulticastconfigurationwasappliedanywhereinthenetwork.Sinceenablingmulticast，thenetworkmonitoringtoolsshowperiodicspikesinlinkutilizationthroughoutthenetwork，eveninareaswherethevideoapplicationisnotbeingused.Whatcouldbeapossiblecause？（）
单项选择题 YouarethenetworkadministratorofanenterprisecompanythatjustdeployedaglobalIPtelephonyenvironment.Inordertoguaranteegoodvoicequality，youaskedyourprovidertoimplementQoSontheCEroutersofyourMPLSnetwork.OnyourLAN，youhavealsodeployedQoS.Users，however，keepcomplainingaboutbadvoicequality，andtheproviderdoesnotseematchesontheDSCPvaluesthatyouhaveaskedhimtomatchupon.Whatismostlikelytheproblem？（）
单项选择题 YouarethenetworkadministratorofaLayer3switchednetwork.UsersinoneVLANarecomplainingthataccesstotheserverVLANisveryslowfromtimetotime.TrafficinthelocalVLANworkswithoutanyissue，andusersinotherVLANsdonothaveanycomplainttoreachtheserverVLAN.Whatismostlikelythecauseofthisissue？（）