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 Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true? （）
单项选择题 Which command enables RSTP on aswitch?（）
多项选择题 Whichtwoaddressescanbeassignedtoahostwithasubnetmaskof255.255.254.0？（）
