Which three commands must you enter to create a trunk that allows VLAN 20?

Which three commands must you enter to create a trunk that allows VLAN 20? (Choose three)
A. Switch(config-if)#switchport mode dynamic auto
B. Switch(config-if)#switchport mode trunk
C. Switch(config-if)#switchport trunk allowed vlan 20
D. Switch(config-if)#switchport mode dynamic desirable
E. Switch(config-if)#switchport trunk encapsulation dotlq
F. Switch(config-if)#switchport trunk native vlan 20

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13 thoughts on “Which three commands must you enter to create a trunk that allows VLAN 20?

  1. B,C,D

    E is not supported in switch, its a command for router
    A does not guarantee the trunk, depends of oposite side
    F wrong ofcourse

  2. Yup BCE

    1) Switch(config-if)#switchport mode trunk (change from access to trunk)
    2) Switch(config-if)#switchport trunk encapsulation dotlq (encapsulate)
    2) Switch(config-if)#switchport trunk allowed vlan 20 ( Allow)

    The native vlan is used to carry untagged traffic accross a trunk – but that has nothing to do with VLAN20 – so F is wrong.

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