1. CCNA 4 Chapter 2 PPP

2. Objectives

3. Introduction to Serial Communication
Transmission system encodes bits into electrical voltage using methods like NRZ-L or AMI
Some of the many serial communications standards include the following: RS-232-E V.35 High-Speed Serial Interface (HSSI)

4. Time-Division Multiplexing

5. Demarcation Point
The point in the network where the responsibility of the service provider or "telco" ends.

6. DTE-DCE

7. Serial Connection Options

8. DTE/DCE Interface
The DTE/DCE interface for a particular standard defines the following specifications:
Mechanical/physical - Number of pins and connector type
Electrical - Defines voltage levels for 0 and 1
Functional - Specifies the functions that are performed by assigning meanings to each of the signaling lines in the interface
Procedural - Specifies the sequence of events for transmitting data

9. HDLC Encapsulation

10. Configuring HDLC Encapsulation

11. Troubleshooting a Serial Interface

12. Troubleshooting a Serial Interface
Five possible problem states can be identified in the interface status line of the show interface serial display:
Serial x is down, line protocol is down.
Serial x is up, line protocol is down.
Serial x is up, line protocol is up (looped).
Serial x is up, line protocol is down (disabled).
Serial x is administratively down, line protocol is down.

13. PPP Layered Architecture

14. PPP and the Data Link Layer

15. PPP and the Network Layer

16. Establishing a PPP Session

17. PPP Operation

18. Link Control Protocol Options

19. PPP Configuration Options

20. Network Control Protocol

21. PPP Authentication Protocols

22. PPP Authentication Protocols

23. Password Authentication Protocol (PAP)

24. Challenge Handshake Authentication Protocol (CHAP)
CHAP provides protection against playback attack through the use of a variable challenge value that is unique and unpredictable.

25. PPP Encapsulation and Authentication Process

26. CHAP Authentication Process

27. Configuring PPP

28. Configuring PPP Authentication

29. PAP Configuration

30. CHAP Configuration

31. Verifying PPP

32. PPP Configuration Commands

33. Debug PPP Authentication

34. Summary

35. END