Transport layer

Transport layer

1. Transport layer function

2. Responsibilities of the transport layer

   • Individual Conversation Tracking
   • Segmentation of data and reassembly of segments
   • Application Identification

3. Conversation Multiplexing

4. Reliability of the transport layer

5. TCP

6. UDP

7. Proper transport layer protocol for proper application

8. TCP features

   • Session establishment
   • Delivery in the same order
   • Flow control

9. TCP header

   • Source port (16 bits) and destination port (16 bits)
   • Sequence number (32 bits)
   • Recognition Number (32 bits)
   • Header Length (4 bits)
   • Reserved (6 bits)
   • Control bits (6 bits)
   • Window size (16 bits)
   • Checksum (16 bits)
   • Urgent (16 bits)

10. CPU Features

11. UDP header

12. Multiple and independent conversations

13. Port numbers

    • Port of origin
    • port of destination

14. Pairs of sockets

15. Port Number Groups

    • Known ports (numbers 0 to 1023)
    • Registered ports (numbers from 1024 to 49151)
    • Dynamic or private ports (numbers 49152 to 65535)

16. The netstat command

17. TCP server processes

18. TCP connection establishment

19. End of the TCP session

20. TCP three-way link analysis

21. TCP Reliability: Orderly Delivery

22. TCP flow control: window size and acknowledgments

23. TCP flow control: congestion prevention

24. Comparison of low overhead and UDP reliability

25. UDP datagram reassembly

26. UDP server processes and requests

27. UDP client processes

28. Applications that use TCP

29. Applications that use UDP

    • Multimedia applications and live video
    • Applications with simple requests and answers
    • Applications that handle reliability on their own