Introduction:
The Command Line Interface (CLI) is a text-based interface used to configure, monitor, and troubleshoot network devices. Unlike graphical interfaces, CLI provides direct control, flexibility, and faster access to device configurations.

Why Use CLI?

• Provides advanced configuration options.
• Offers greater speed and control for experienced users.
• Enables remote access via protocols like SSH and Telnet.

Common CLI Modes in Cisco Devices:

1. User EXEC Mode:

   • Provides basic access to view device status.
   • Prompt: >

2. Privileged EXEC Mode:

   • Enables advanced commands for diagnostics and configurations.
   • Prompt: #

3. Global Configuration Mode:

   • Used for configuring the device.
   • Accessed from Privileged EXEC mode using the configure terminal command.

Basic Commands to Get Started:

• show running-config: Displays the current configuration.
• enable: Moves to Privileged EXEC mode.
• interface : Access interface configuration.
• ping : Tests connectivity to a device.

Benefits of Learning CLI:

• CLI proficiency is a critical skill for network administrators.
• It allows for automation and scripting, making network management efficient.

Conclusion:
CLI is the backbone of network device management. Mastering its commands and understanding its structure will provide you with a strong foundation in networking.