5.3.1: As discussed on Day 23 for the switch, the Cisco IOS CLI provides the following command modes:
• User EXEC mode is the default mode, where you can view information about the operation of a switch and test connectivity.
• Privileged EXEC mode allows you to adjust the router’s operation and view configuration files.
• Global configuration mode allows you to configure the router and enter submodes for specific configurations.
5.3.2: If you enter the help command at the command prompt, the Cisco CLI describes the help system. You can also use the question mark for additional help in the following ways:
• If you enter the first few letters of a command with a question mark at the end (no space), the output lists ...