多项选择题
A.192.168.1.16/28B.192.168.1.64/27C.192.168.1.128/27D.192.168.1.96/28E.192.168.1.192/28
A.256B.254C.64D.62E.32F.16
A.255.255.255.0B.255.255.255.128C.255.255.255.224D.255.255.255.240