User EXEC mode Limited to basic monitoring commands
Privileged EXEC mode Provides access to all other router commands
Global configuration mode Commands that affect the entire system
Specific configuration modes Commands that affect interfaces/processes only Setup mode Interactive configuration dialog
Entering the CLI from on Router
After the interface status messages appear and you press Enter, the
Router> prompt will appear. This is called user exec mode (user mode), and it’s mostly used to view statistics.
We can only view and change the configuration of a Cisco router in privileged exec mode (privileged mode), which you can enter with the enable command. Here’s how:
Router# prompt, which indicates that you’re in Privileged mode, where you can both view and change the router’s configuration.
We can go back from privileged mode into user mode by using the disable command, as seen here:
To configure from a CLI, you can make global changes to the router by typing configure terminal
Router# config terminal
To make changes to an interface, you use the interface command from global configuration mode