【简答题】
A、A.IP172.16.1.2子网掩码255.255.255.0网关172.16.1.254DNS202.103.24.68 B、B.IP172.16.1.2子网掩码255.255.255.0网关172.16.1.1DNS202.103.24.68 C、C.IP58.19.28.2子网掩码255.255.255.252网关172.16.1.1DNS202.103.24.68 D、D.IP58.19.28.2子网掩码255.255.255.252网关58.19.28.1DNS202.103.24.68