This book focuses on Internet congestion control with special emphasis given to signaling and network architecture. The author introduces a new protocol called Performance Transparency Protocol (PTP) and a congestion control mechanism called Congestion Avoidance with Distributed Proportional Control (CADPC), as well as provides: §Complete specification of PTP; §New simulation results that show how CADPC/PTP outperforms several current alternatives; §A new method of using the well-known Chiu/Jain vector diagrams for analysis and design; §A short and easily comprehensible introduction to Congestion Control and Quality of Service; §An overview of explicit signaling mechanisms between end points and the network. §Scalable Performance Signalling and Congestion Avoidance provides a wealth of information on Internet and network congestion avoidance for network engineers and researchers.