Cisco Certified Network Associate (CCNA) Practice Exam

How do you assign an interface to a specific VLAN?

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

2. (config-if)#vlan access VLAN NUMBER

3. (config)#vlan assign VLAN NUMBER

4. (config-if)#interface vlan VLAN NUMBER

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

To assign an interface to a specific VLAN, the correct command is to use the "switchport access vlan VLAN NUMBER" configuration in interface mode. This command is specifically designed for Ethernet interfaces on switches that will be used as access ports. When you apply this command, you tell the switch that any traffic on that specific interface will belong to the designated VLAN. Access ports operate at Layer 2 and carry traffic for a single VLAN, which is essential for segmenting network traffic and managing broadcast domains in a switched network environment. The other options presented do not accomplish the same configuration. For instance, the second option does not follow the correct syntax used in Cisco IOS, while the third option incorrectly implies a command that does not exist. The fourth option refers to a command related to VLAN interfaces, which is used for configuring switched virtual interfaces (SVIs) rather than assigning access ports to VLANs. Thus, using the appropriate command is crucial for establishing the correct port-to-VLAN relationship, ensuring efficient traffic management within the network.