Learn how to use the Cisco IOS Command-Line Interface (CLI) to configure Cisco devices in this comprehensive video tutorial. Explore essential concepts including CLI basics, connection methods, terminal emulators, user and privileged EXEC modes, and global configuration mode. Master important commands such as 'enable password', 'service password-encryption', and 'enable secret'. Understand the differences between running-config and startup-config, and learn how to save configurations. Practice your knowledge with multiple quizzes throughout the tutorial. Gain hands-on experience with Cisco IOS CLI shortcuts, canceling and deleting commands, and other crucial skills for CCNA 200-301 certification preparation.