Cisco Certified Network Associate (CCNA) Practice Exam

What command is used to change the Native VLAN from its default?

1. (config-if)#switchport trunk native vlan VLAN NUMBER

2. (config)#interface INTERFACE

3. #switchport native vlan set

4. #change native vlan

The correct answer is: (config-if)#switchport trunk native vlan VLAN NUMBER

The command used to change the Native VLAN from its default is indeed related to the syntax that includes the "switchport trunk native vlan" phrase. This command is essential in configuring VLANs on a switch interface, particularly when dealing with trunk ports. In a typical scenario, the Native VLAN is the default VLAN (typically VLAN 1) on trunk links, which is used for untagged traffic. When you issue the command that specifies "switchport trunk native vlan VLAN NUMBER," you are explicitly setting a different VLAN for untagged traffic on the trunk link. This configuration enhances network security and helps avoid issues related to VLAN hopping by ensuring that untagged traffic does not automatically default to VLAN 1. The proper syntax not only indicates that you want to change the default but also specifies the actual VLAN number to which you are assigning the native VLAN role. The other options do not accurately reflect the command used in this context. One option references interface configuration but does not provide the command to change the Native VLAN. Others are not valid configurations recognized in Cisco IOS for modifying the native VLAN setting. Thus, the correct choice aligns with the requisite configuration standards commonly applied in Cisco networking environments.