如下图所示，在一台Cisco Catalyst 3500交换机上连接2台PC机，使用端口划分方法将它们分别划分在VLAN ID为21、22，VLAN名为VL21、VL22的VLAN中，下列关于交换机VLAN的配置，正确的是( )。

A．Switch-3548#vlan data Switch-3548(vlan)#vlan 21 name vl21 Switch-3548(vlan)#vlan 22 name vl22 Switch-3548(vlan)#exit Switch-3548#configure terminal Switch-3548(config)#int f0／1 Switch-3548(config-if)#switchport access vlan 21 Switch-3548(config)#int f0／2 Switch-3548(config-if)#switchpon access vlan 22
B．Switch-3548#vlan data Switch-3548(vlan)#set vlan 21 name vl21 Switch-3548(vlan)#set vlan 22 name vl22 Switch-3548(vlan)#exit Switch-3548#configure terminal Switch-3548(config)#int f0／1 Switch-3548(config-if)#switchport access vlan 21 Switch-3548(config)#int f0／2 Switch-3548(config-if)#switchport access vlan 22
C．Switch-3548#vlan data Switch-3548(vlan)#vlan 21 name vl21 Switch-3548(vlan)#vlan 22 name vl22 Switch-3548(vlan)#exit Switch-3548#configure terminal Switch-3548(config)#int f0／l Switch-3548(config-if)#switchport allowed vlan 21 Switch-3548(config)#int f0／2 Switch-3548(config-if)#switchport allowed vlan 22
D．Switch-3548#vlan data Switch-3548(vlan)#vlan 21 name vl21 Switch-3548(vlan)#vlan 22 name vl22 Switch-3548(vlan)#exit Switch-3548#configure terminal Switch-3548(config)#int f0／1 Switch-3548(config-if)#switchport access 21 Switch-3548(config)#int f0／2 Switch-3548(config-if)#switchport access 22