()地址的默认子网掩码是255.255.255.0,或0xFFFFFF00。
A、A类
B、B类
C、C类
A.255.255.255.0
B.255.255.255.128
C.255.255.255.192
D.255.255.255.224
A.255.0.0.0
B.255.255.0.0
C.255.255.255.0
D.255.255.255.255
A.218.22.50.0
B.218.22.50.224
C.218.22.50.32
D.218.22.50.40
A.192.168.10.0
B.192.168.11.0
C.192.168.15.0
D.192.168.0.0
A.255.255.0.0
B.255.255.255.0
C.255.255.255.192
D.255.255.255.224