You work as a technician at TestKing. You are configuring a Cisco router. You want to configure the IP address on an interface.Which command should you use?()
A、router(config-if)#ip address 142.8.2.1 subnet mask 255.255.252.0
B、router(config-if)#142.8.2.1 0.0.3.255
C、router(config-if)#ip address 142.8.2.1 255.255.252.0
D、router(config-if)#142.8.2.1 subnet mask 255.255.252.0
E、router(config-if)#ip address 142.8.2.1 0.0.3.255
F、router(config-if)#ip address 142.8.2.1 subnet mask /22