The document discusses flow control mechanisms in computer networks, specifically focusing on Automatic Repeat reQuest (ARQ) methods such as Stop-and-Wait, Go-Back-N, and Selective Repeat. It provides details on how these mechanisms handle issues like damaged, lost, or delayed acknowledgment frames, as well as their respective advantages and disadvantages. The content is aimed at educating readers, particularly within a computer science context.

1. WELCOME

2. Flow Control
In
Computer Network
Ahtesham Ullah Khan
CSE 3rd year

3. FLOW CONTROL

4. FLOW CONTROL MECHANISM
ARQ > Automatic Review Req

5. 1. STOP-and-WAIT

6. STOP-and-WAIT ARQ
(damaged ACK Frame)

7. STOP-and-WAIT ARQ
(lost ACK Frame)

8. STOP-and-WAIT ARQ
(delayed ACK Frame)

9. PIGGYBACKING

10. Disadvantages of STOP-and-
WAIT

11. -> GO-BACK-N ARQ

12. -> SELECTIVE REPEAT

13. SEQUENCE NUMBERS

14. SENDER SLIDING WINDOW

15. RECEIVER SLIDING WINDOW

16. CONTROL VARIABLE

17. ACKNOWLEDGEMENT

18. GO-BACK-N
(NORMAL OPERATION)

19. GO-BACK-N
(LOST FRAME)

20. GO-BACK-N
(LOST / DAMAGED / DELAYED FRAME)

21. GO-BACK-N
(SENDER WINDOW SIZE)

22. SELECTIVE REPEAT

23. SELECTIVE REPEAT
(LOST FRAME)

24. SELECTIVE REPEAT ARQ
(SENDER WINDOW SIZE)

25. THANK YOU