1. Data Link Control Line Discipline Flow Control Error Control

2. Functions of Data Link Layer Functions of Data Link Layer Figure 10-1

3. Figure 10-2

4. Figure 10-3

5. ENQ/ACK Figure 10-4

6. Figure 10-5 ENQ/ACK

7. Multipoint Discipline Figure 10-6

8. Select Figure 10-7

9. Poll Figure 10-8

10. Figure 10-9 Flow control – set of procedures that tells the sender how much data it can transmit before it must wait for an acknowledgement from the receiver

11. Stop and Wait Figure 10-10

12. Sliding Window Figure 10-11

13. Figure 10-12 Sender Sliding Window

14. Figure 10-13 Receiver Sliding Window

15. Figure 10-14 Sliding Window Example

16. Figure 10-14-continued Sender

17. Figure 10-14-continued Receiver

18. Figure 10-15

19. Damaged Frame Figure 10-16

20. Lost Frame Figure 10-17

21. Lost ACK Figure 10-18

22. Damaged Frame Figure 10-19

23. Lost Frame Figure 10-20

24. Lost ACK Figure 10-21

25. Selective Reject Figure 10-22

26. Reference Data Communications and Networking, 2 nd ed. by Behrouz A. Forouzan