What command is used to create a VLAN on a Cisco switch?

The command used to create a VLAN on a Cisco switch is "vlan vlan-number." This command is executed in the switch's global configuration mode.

When issuing this command, you specify the VLAN number you wish to create. After entering this command, you enter the VLAN configuration mode, where additional parameters and attributes for the VLAN can be configured (like the name of the VLAN, associated ports, etc.). This command is essential for configuring Virtual Local Area Networks, which help segment networks and improve network efficiency by reducing broadcast domains.

Other options do not represent valid commands in Cisco's IOS. "Configure vlan," "create vlan," and "enable vlan" do not conform to the syntax required to successfully create a VLAN. This illustrates the standardized command structure in Cisco IOS that helps ensure consistency and reliability in network configurations.