What command configures a switch interface as a routed port?

To configure a switch interface as a routed port, the correct command is "no switchport." This command is used on Layer 2 switches to convert a standard access or trunk port into a Layer 3 routed port.

When you issue the "no switchport" command on a specific interface, the switch stops treating the port as a Layer 2 switchport and instead allows it to operate at Layer 3. This enables the interface to participate in IP routing, allowing for the configuration of an IP address directly on that interface. Consequently, the switch can perform routing functions similar to those of a router, effectively allowing this port to handle traffic based on Layer 3 protocols.

The other choices provided are not valid commands for configuring routed ports on a Cisco switch. "switchport disable" is not a recognized command that you would use to set a routed port; it’s more commonly related to disabling the switchport feature but doesn’t serve the intended purpose. "set interface routed" and "interface routed" do not exist in Cisco’s command syntax for this function. As such, understanding that "no switchport" is the key command to enable Layer 3 capabilities on a switch port is essential for effectively managing Cisco switch configurations.