The document discusses Point-to-Point Protocol (PPP) and includes figures illustrating a point-to-point link, PPP transition states, PPP layers, PPP frames, encapsulation of Link Control Protocol (LCP) packets in frames, Password Authentication Protocol (PAP), PAP packets, Challenge Handshake Authentication Protocol (CHAP), CHAP packets, and encapsulation of Internet Protocol Control Protocol (IPCP) packets in PPP frames.

1. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Chapter 15
Point-to-Point
Protocol

2. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-1
Point-to-Point Link

3. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-2
Transition States

4. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-3
PPP Layers

5. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-4
PPP Frames

6. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-5
LCP Packet Encapsulated in a Frame

7. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-6
PAP

8. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-7
PAP Packets

9. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-8
CHAP

10. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-9
CHAP Packets

11. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-10
IPCP Packet Encapsulated in PPP Frame

12. McGraw-Hill ©The McGraw-Hill Companies, Inc., 2001
Figure 15-11
An Example