Which Cisco IOS command would control the VLAN that is assigned to frames received on a trunking interface that do not include an 802.1Q tag?

A) switchport trunk native vlan-id
B) switchport trunk vlan vlan-id
C) switchport native vlan vlan-id
D) switchport native trunk vlan vlan-id

A
Explanation: A) All traffic that is considered to be part of the native VLAN is sent and received without an 802.1Q tag. To configure the native VLAN on an interface, use the switchport trunk native vlan-id command.