Whichthreestatementsaccuratelydescribelayer2Ethernetswitches？（）

A.Microsegmentationdecreasesthenumberofcollisionsonthenetwork.
B.ifaswitchreceivesaframeforanunkowndestination，itusesARPtoresolvetheaddress.
C.SpanningTreeProtocolallowsswitchestoautomaticallysharevlaninformation.
D.Inaproperlyfunctioningnetworkwithredundantswitchedpaths，eachswichedaegmentwillcontainonerootbridgewithallitsportsintheforwardingstate.Allotherswitchesinthatbroadcastdomainwillhaveonlyonerootport.
E.Establishingvlansincreasesthenumberofbroadcastdomains.
F.Switchesthatareconfiguredwithvlansmakeforwardingdecisionsbasedonbothlayer2andlayer3addressinformation.

【参考答案】

A, D, F