多项选择题
Which two RSTP port roles include the port as part of the active topology？（）
A.root B.designated C.alternate D.backup E.forwarding F.learning
多项选择题 WhichtwoDTPmodeswillpermittrunkingbetweendirectlyconnectedswitches？（）
多项选择题 WhichtwostatementscorrectlydescribeVTP？（）
多项选择题 Whichtwoofthefollowingstatementsdescribearoutedswitchportonamultilayerswitch？（）
