This course in Computer Networks provides a comprehensive introduction to the principles, architecture, and operation of modern data communication systems. It explores key networking concepts such as network models (OSI and TCP/IP), protocols, addressing, routing, switching, and network security. Students will gain practical knowledge of how computers communicate across local and wide-area networks, including the Internet, and how data is transmitted reliably and efficiently. Emphasis is placed on real-world applications, network configuration, and troubleshooting, equipping learners with both theoretical understanding and hands-on skills essential for careers in IT and networking.