1. Basic switch and router configuration

2. Switch configuration
The Cisco IOS (Internetwork Operating System) is a command-line interface used by nearly all current Cisco routers and switches. The IOS provides the mechanism for configuration.
The IOS is structured into several modes
1. User mode (User EXEC): we can identify by > symbol.
Router> User mode
2. Privileged mode: we can identify by # symbol.
Router# Previlage mode
3. Global configuration mode: we can identify by (config)# symbol.
Router(config)# Global Configuration Mode

3. Navigating command line interface modes
User mode (User EXEC): Allows a person to access only a limited number of basic monitoring commands. show, telnet, ping commands. It can be recognized by “>” sign
Privileged mode: is password protected, and allows the use of all User mode commands available on the system and some other commands. It can be recognised by “#” sign. Show commands are mainly executable here.
* To change from user mode to privileged mode enter the enable command and to return enter the disable or exit command.

4. Navigating command line interface modes
3. Global configuration mode: To configure global switch parameters such as the switch hostname or the switch IP address used for switch management purposes. It can be recognised by “(config)# “.
* to enter this mode you need to enter the configure terminal command from privileged mode.
* to return enter the exit command.

5. Navigating command line interface modes
There are many other modes, for example: “Interface Configuration Mode”.
This mode lets you configure an interface and it can be recognised by “(config-if)#”.
To return you need to enter the exit command.

6. Navigating command line interface modes

7. Navigating command line interface modes