1. Transport Layer Flow

2. Socket Connections

3. UDP Segment Structure

4. NTP Network Time Protocol –Uses port 123 UDP (User Datagram Protocol) Atomic Clock Synchronization Multiple Master Servers Used for –Distributed Databases –Client/Server –Security –Authentication

5. Clock Synchronization Time Server Time Client mt mr Tround = mt + mr time = t Clock set is t + Tround/2

6. Alternating bit protocol

7. Stop and Wait/Pipelined

8. Go-Back-N

9. Selective Repeat

10. SR Operation

11. SR windowing

12. TCP segment structure

13. TCP Segmentation

14. Sequence and Acknowledgement

15. Retransmission

16. Not Transmitted

17. Cumulative Acknowledgement

18. TCP Handshake

19. TCP Close

20. TCP sequences

21. Routing traffic

22. Multiple routers

23. TCP Slow Start

24. A Typical Wiring Closet Hubs & Switches - No routers

25. Transport Layer The End