多项选择题
Which two states are the port states when RSTP has converged?（）
A.blocking B.learning C.disabled D.forwarding E.listening
多项选择题 WhichcommandsarerequiredtoproperlyconfigurearoutertoproperlyconfigurearoutertorunOSPFandtoaddnetwork192.168.16.0/24toOSPFarea0？（）
单项选择题 How many addresses for hosts will the network 124.12.4.0/22 provide?（）
单项选择题 Whichstatementaboutvlanoperationonciscocatalystswitchesistrue？（）
