This document discusses Frame Relay, a packet switching protocol used in wide-area networks. It compares Frame Relay to traditional T-line networks and X.25, describing how Frame Relay supports variable bit rate data transmission using permanent and switched virtual circuits (PVCs and SVCs), congestion control methods like BECN, FECN and leaky bucket algorithms, and address formats like FRAD that allow multiple destinations per interface.

1. Frame
Relay

2. Frame Relay versus Pure
Mesh T-Line Network

3. Fixed-Rate versus Bursty Data

4. X.25 Traffic

5. Frame Relay Traffic

6. Frame Relay Network

7. DLCIs

8. PVC DLCIs

9. SVC Setup and Release

10. SVC DLCIs

11. DLCIs Inside a Network

12. Frame Relay Switch

13. Frame Relay Layers

14. Comparing Layers in
Frame Relay and X.25

15. Frame Relay Frame

16. BECN

17. FECN

18. Four Cases of Congestion

19. Leaky
Bucket

20. A Switch Controlling the Output Rate

21. Flowchart for Leaky
Bucket Algorithm

22. Example of Leaky Bucket Algorithm

23. Relationship between Traffic
Control Attributes

24. User Rate in Relation to Bc and Bc + Be

25. Three Address Formats

26. FRAD