The document discusses various functions and protocols of the data link layer, including framing, error control, flow control, and elementary protocols like stop-and-wait and sliding window protocols. It also covers topics like error detection codes, finite state machines, Petri nets, and example data link layer protocols including HDLC, PPP, and protocols used in the Internet.

1. The Data Link Layer Chapter 3

12. Error-Detecting Codes Calculation of the polynomial code checksum.

14. Protocol Definitions Continued  Some definitions needed in the protocols to follow. These are located in the file protocol.h.

15. Protocol Definitions (ctd.) Some definitions needed in the protocols to follow. These are located in the file protocol.h.

16. Unrestricted Simplex Protocol

17. Simplex Stop-and-Wait Protocol

18. A Simplex Protocol for a Noisy Channel A positive acknowledgement with retransmission protocol. Continued 

19. A Simplex Protocol for a Noisy Channel (ctd.) A positive acknowledgement with retransmission protocol.

22. A One-Bit Sliding Window Protocol Continued 

23. A One-Bit Sliding Window Protocol (ctd.)

26. Sliding Window Protocol Using Go Back N Continued 

27. Sliding Window Protocol Using Go Back N Continued 

28. Sliding Window Protocol Using Go Back N Continued 

29. Sliding Window Protocol Using Go Back N

31. A Sliding Window Protocol Using Selective Repeat Continued 

32. A Sliding Window Protocol Using Selective Repeat (2) Continued 

33. A Sliding Window Protocol Using Selective Repeat (3) Continued 

34. A Sliding Window Protocol Using Selective Repeat (4)