A.10001000 B.10000001 C.11001000 D.10010000
A.通過其子網掩碼 B.通過其MAC地址 C.通過其IP地址 D.通過其網絡編號
A.15.129.89.76 B.151.129.89.76 C.193.129.89.76 D.223.129.89.76