交换机命令show interfaces type0/port_# switchport|trunk用于显示中继连接的配置情况，下面是显示例子：
2950#show interface fastEthernet0/1 switchport
Name:fa0/1
Switchport:Enabled
Admini strat ive mode:trunk
Operat ional Mode:trunk
Administrative Trunking Encapsulation:dotlq
Operational Trunking Encapsulation:dotlq
egotiation of Trunking:disabled
AccesS Mode VLAN:0((inactive))
Trunking Native Mode VLAN:1(default)
Trunking VLANs Enabled:all
Trunking VLANs active:1，2
Pruning VLANs Enabled:2-1001
Priority for untagged frames:0
Override vlan tag priority:FALSE
Voice VLAN:none
在这个例子中，端口fa0/1的链路模式被设置为______状态，默认的vlan是______。
A．VLAN0
B．VLANl
C．VLAN2
D．VLAN3
