You will learn about the fundamentals of digital data transmission and the functional principles of computer network technologies, such as local area networks (LANs) and wide area networks (WANs). Then the TCP/IP reference model will be introduced, with its protocols and countless applications. You will learn about the roles of the various Internet protocols of the TCP/IP stack. In particular, we will introduce the Internet protocols IPv4 (the present one) and IPv6 (the future one) as well as TCP and UDP, which enable the transfer of all kind of data over the Internet. We will conclude the course by introducing various Internet protocols that enable Internet applications, such as email or audio and video communication. If you follow the lectures, you will gain a comprehensive insight into the complex world of Internet technologies.