多项选择题
Which two are features of IPv6?（）
A.multicast B.broadcast C.allcast D.podcast E.anycast
多项选择题 Which two states are the port states when RSTP has converged?（）
多项选择题 Which two are advantages of static routing when compared to dynamic routing?（）
多项选择题 Why do large OSPF networks use a hierarchical design?（）
