Refer to the exhibit. What is achieved by this code?

The `no shutdown` command is used within interface configuration mode to administratively enable an interface, allowing it to become operational and pass traffic if other conditions are met. Applying this to a loopback interface brings it out of a shutdown state.

Displaying an interface typically uses `show` commands, such as `show interface loopback X`, not a configuration command.

Loopback interfaces are identified by their type and number (e.g., Loopback0), and there is no standard Cisco IOS command to rename an interface.

Deleting a loopback interface configuration would involve removing its configuration lines or omitting it entirely, not using a `no shutdown` command.