A. [Switch]vlan4[Switch-vlan4]portethernet0/1 B. [Switch]vlan4[Switch-Ethernet0/1]portaccessvlan4 C. [Switch]vlan4[Switch-vlan4]portaccessethernet0/1 D. [Switch]vlan4[Switch-Ethernet0/1]portaccessvlanpvid4
A. 对 B. 错