单项选择题
A.192.168.1.64/26B.192.168.1.32/27C.192.168.1.32/28D.192.168.1.64/29
A./25B./26C./27D./28
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