单项选择题
A.划分为1024个子网 B.每个子网有64台主机 C.每个子网有62台主机 D.划分为2044个子网
A.255.255.255.0 B.255.255.250.0 C.255.255.248.0 D.255.255.240.0
A.100.1.32.7 B.192.178.32.2 C.172.17.32.15 D.172.35.32.244