单项选择题
A.172.112.15.17 B.172.112.15.14 C.172.112.15.16 D.172.112.15.31
A.被划分为62个子网 B.每个子网有64个主机地址 C.被划分为32个子网 D.每个子网有62个主机地址
A.10.216.33.124 B.127.0.0.1 C.172.34.21.15 D.192.32.146.23