"After an overview of the distinctive features of interactive multimedia applications, their requirements on the network are discussed: limited delay and delay variation (Jitter) are identified as the most demanding requirements. The most common techniques for controlling service quality are presented and the two major frameworks for their deployment within IP networks, i.e., Integrated Services (IntServ) and Differentiated Services (DiffServ), outlined. The tutorial also studies the implications of the architecture of packet switches on delay bounds. Finally, the tutorial delves into more detail by analyzing the end-to-end delay components of a videoconferencing system step-by-step."