Networks and the Internet. Network Applications . Planning authorities and transport service, multiplexing applications , UDP, principles of reliable data transfer , TCP, congestion control . Network layer , routing principles , hierarchical routing , IP, routing the Internet, routers , IPv6, routing multiple recipients. Link layer and local networks , detection and control errors , network protocols and multiple access , Ethernet, IEEE 802.11, PPP, ATM technology networks , frame relay. Delay models: basic models and results from queuing theory and applications in networks . Technical quality control service . Introduction to wireless and cellular systems and mobile networks