Which configuration can you apply to enable encapsulation on a subinterface?

Which configuration can you apply to enable encapsulation on a subinterface?
A . interface FastEthernet 0/0
encapsulation dot1Q 30
ip address 10.1.1.30 255.255.255.0
B . interface FastEthernet 0/0.30
ip address 10.1.1.30 255.255.255.0
C . interface FastEthernet 0/0.30
description subinterface vlan 30
D . interface FastEthernet 0/0.30
encapsulation dot1Q 30
ip address 10.1.1.30 255.255.255.0

View Answer

Answer: D