A.ip address 192.168.1.1 255.255.255.253 B.ip address 192.168.1.1 255.255.255.250 C.ip address 192.168.1.1 255.255.255.240 D.ip address 192.168.1.1 255.255.255.0
A.interface s0/0 B.interface Ethernet1/0 C.interface Ethernet1/0/0 D.interface 0/0
A.15個(gè) B.20個(gè) C.25個(gè) D.30個(gè)