某局域网用一台路由器互联4个子网,各子网的网络地址分别是193.22.56.0/26、193.22.56.64/26、193.2
A.network 193.22.56.0255.255.255.192
B.network 193.22.56.0 0.0.0.192
C.network 193.22.56.0 255.255.255.192 network 193.22.56.64 255.255.255.192 network 193.22.56.128 255.255.255.192 network 193.22.56.192 255.255.255.192
D.network 193.22.56.0 0