You need to change the native VLAN for interface Fa0/23 from VLAN 1 to VLAN 999. Which command would you use?

The command to change the native VLAN of a trunk to VLAN 999 is switchport trunk native vlan 999. The commands native vlan 999 and switchport native vlan 999 are incorrect. Negating the command with no switchport native vlan 1 and then configuring switchport native vlan 999 is incorrect.