Transport layer:overview Our goal: understand principles learn about Internet transport behind transport layer layer protocols: services: UDP:connectionless transport ·multiplexing, TCP:connection-oriented reliable demultiplexing transport reliable data transfer TCP congestion control 。flow control 。congestion control Transport Layer:3-2Transport layer: overview Our goal: ▪ understand principles behind transport layer services: • multiplexing, demultiplexing • reliable data transfer • flow control • congestion control ▪ learn about Internet transport layer protocols: • UDP: connectionless transport • TCP: connection-oriented reliable transport • TCP congestion control Transport Layer: 3-2