3.4 Troubleshooting WAN Connectivity (CCNA 4: Chapter 3: Point-to-Point Connections)

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3.4 Troubleshooting WAN Connectivity
Upon completion of this section, you should be able to:
Use show and debug commands to troubleshoot PPP.

Chapter 3: Objectives
In this chapter, you will be able to:
Explain the fundamentals of point-to-point serial communication across a WAN.
Configure HDLC encapsulation on a point-to-point serial link.
Describe the benefits of using PPP over HDLC in a WAN.
Describe the PPP layered architecture and the functions of LCP and NCP.
Explain how a PPP session is established.
Configure PPP encapsulation on a point-to-point serial link.
Configure PPP authentication protocols.
Use show and debug commands to troubleshoot PPP.

Chapter 3: Overview
This chapter covers the terms, technology, and protocols used in serial connections.
The HDLC and Point-to-Point Protocols (PPP) are introduced.
PPP is a protocol that is able to handle authentication, compression, error detection, monitor link quality, and logically bundles multiple serial connections together to share the load.