Based on the course computer communications the architecture of IP networks is known. Contents of this course will be additional networking technologies such as circuit switching (telephony, SONET/SDH/WDM) and networks with virtual circuit switching (ATM, MPLS) as well as network virtualization (SDN, NFV), multimedia communications over packet switched networks (streaming, RTP, SIP, multicast), quality-of-service in packet switched networks (integrated services, RSVP, differentiated services, active queue management, policing, scheduling), wireless and mobile communications (GSM, UMTS, LTE, 5G, Wimax, WLAN, Bluetooth, sensor networks such as ZigBee). Industrial communication will also be a topic. In the tutorial practical tasks are performed in the laboratory: One laboratory contains several IP routers, switches and computers, IP phones and VoIP telephone software. Various configurations are set up and tested. Another part of the tutorial deals with mobile communications.