What command is typically used to display the active VLANs on a switch?

The command that is commonly used to display the active VLANs on a switch is "show vlan brief." This command provides an overview of all VLANs configured on the switch, including details such as the VLAN ID, name, and status of each VLAN. When executed, it lists the VLANs that are currently operational on the switch and helps network administrators quickly assess the VLAN setup.

This command is particularly useful for troubleshooting VLAN-related issues, confirming VLAN assignments, and verifying that the expected VLANs are active and functioning correctly. It enables network professionals to ensure that their VLAN configurations are in line with their network design and operational requirements, facilitating more efficient network management.