Chapter 3:roadmap Transport-layer services -Multiplexing and demultiplexing Connectionless transport:UDP Principles of reliable data transfer Connection-oriented transport:TCP Principles of congestion control TCP congestion control Evolution of transport-layer functionality Transport Layer:3-10Chapter 3: roadmap ▪ Transport-layer services ▪ Multiplexing and demultiplexing ▪ Connectionless transport: UDP ▪ Principles of reliable data transfer ▪ Connection-oriented transport: TCP ▪ Principles of congestion control ▪ TCP congestion control ▪ Evolution of transport-layer functionality Transport Layer: 3-10