下面IP地址哪个是C类地址?( ) A.22.23.45.56 B.166.122.23.100 C.190.180.171.19 D.212.22.68.201

问题描述:

下面IP地址哪个是C类地址?( ) A.22.23.45.56 B.166.122.23.100 C.190.180.171.19 D.212.22.68.201

B