Which command is used to display the current VLAN configuration on a switch?

The command used to display the current VLAN configuration on a switch is "show vlan." This command is commonly used in network devices to provide a detailed overview of the VLANs configured on the switch, including information such as VLAN IDs, names, status, and the ports associated with each VLAN. By executing this command, network administrators can quickly verify and troubleshoot VLAN configurations to ensure they are set up correctly and functioning as expected.

In the context of understanding switch commands, it’s important to recognize that the "show" command is a standard convention across many networking devices for displaying operational data. Other commands like "view vlan," "list vlan," and "check vlan" are not standard commands used to retrieve VLAN information on switches, which is why they would not yield the necessary output to show the current configuration.