What is the function of the command switchport trunk native vlan 999 on a Cisco Catalyst switch?

This question tests the operating principles of the Layer 2 switch. Check the MAC address table of Switch1 and find that the MAC address of the host does not exist in the table. Switch1 will flood
What is the function of the command switchport trunk native vlan 999 on a Cisco Catalyst switch?
A. It creates a VLAN 999 interface.
B. It designates VLAN 999 for untagged traffic.
C. It blocks VLAN 999 traffic from passing on the trunk.
D. It designates VLAN 999 as the default for all unknown tagged traffic.

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2 thoughts on “What is the function of the command switchport trunk native vlan 999 on a Cisco Catalyst switch?

  1. Answer D is correct, but it should report that VLAN 999 is native! as only the native VLAN accepts untagged frames.

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