This is an introductory course in computer networks. It gives an overview of current computer networks and its history. It introduces the OSI and TCP/IP network architecture models and protocols. It then studies the implementation principles and design issues at each layer of these models. Lecture topics include: the structure and components of computer networks, application layer protocols, packet switching, layered architectures, TCP/IP, physical layer, error control, local area networks (wire and wired), network layer, congestion control, and multiple access. Laboratory work focuses on experimenting with packet tracing tools and the implementation of protocols covered in lectures, e.g., stop-and-wait protocol, socket programming, Dijkstra routing algorithm and others.