多项选择题
Which three combinations are valid LACP configurations that will set up a channel？（）
A.On/On B.On/Auto C.Passive/Active D.Desirable/Auto E.Active/Active F.Desirable/Desirable
单项选择题 In802.1s，howistheVLANtoinstancemappingrepresentedintheBPDU？（）
多项选择题 Whichthreeoptionsareconsideredinthespanning-treedecisionprocess？（）
多项选择题 WhichthreeoptionsarefeaturesofVTPversion3？（）
