Default Operating Mode

A.

When you initially log in to a router, the default operating mode is user EXEC mode. User EXEC mode is the basic operational mode of the router, which allows users to perform basic tasks such as checking system status and running diagnostic commands.

In this mode, users have limited privileges and can only execute a limited set of commands. These commands are typically used for monitoring and basic troubleshooting.

To access more advanced commands and functions, users need to enter privileged EXEC mode. This can be achieved by entering the "enable" command, followed by the privilege password (if configured). In privileged EXEC mode, users have access to all router commands and can perform tasks such as configuring interfaces, routing protocols, and security settings.

Global configuration mode, on the other hand, is a mode that is entered from privileged EXEC mode by entering the "configure terminal" command. In global configuration mode, users can configure various settings on the router, such as interfaces, routing protocols, and access control lists.

ROM monitor mode, also known as ROMMON, is a special mode that is used to perform low-level configuration and diagnostic tasks. This mode is typically only accessed in the event of a hardware failure or when performing a software upgrade or recovery. It is not the default operating mode when you initially log in to a router.