CCNA: Cisco Certified Network Associate — Question 1269

An engineer must configure traffic for a VLAN that is untagged by the switch as it crosses a trunk link. Which command should be used?

Answer options

• A. switchport trunk encapsulation dot1q
• B. switchport trunk allowed vlan 10
• C. switchport mode trunk
• D. switchport trunk native vlan 10

Correct answer: D

Explanation

The correct command, 'switchport trunk native vlan 10', is used to specify the native VLAN for untagged traffic on a trunk link. The other options do not configure the native VLAN; instead, they relate to encapsulation, allowed VLANs, or setting the trunk mode without specifying the native VLAN.