复制题目向AI提问
A.Switch-3548 (config-if) # switchport trunk encapsulation dot1q?
Switch-3548 (config-if) # switchport trunk allowed vlan 1,10,20,30
B.Switch-3548 (config-if) # switchport mode trunk
Switch-3548 (config-if) # switchport trunk encapsulation isl?
Switch-3548 (config-if) # switchport trunk allowed vlan 1-30
C.Switch-3548 (config-if) # switchport mode trunk
Switch-3548 (config-if) # switchport trunk encapsulation negotiate?
Switch-3548 (config-if) # switchport trunk allowed vlan 1-30
D.Switch-3548 (config-if) # switchport mode trunk
Switch-3548 (config-if) # switchport trunk encapsulation dot1q
Switch-3548 (config-if) # switchport trunk allowed vlan 1,10,20,30
答案:D。
解析:IEEE802.1Q可用于不同厂家的交换机设备互连,是实现VLAN Trunk的唯一标准协议,因此,不同厂家交换机互连要实现VLAN Trunk功能时,必须在直接相连的两台交换机端口上都封装dot1q协议。VLAN Trunk协议配置的步骤为:1.进入继模式:#Switchport Mode trunk;2.封装协议:#Switchport trunk encapsulation dotiq;3.指定所属的VLAN:#Switchport trunk allow VLAN1,10,20,30,故D选项正确。">
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