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Chapter 22. Wide Area Network Connections

Chapter 22. Wide Area Network Connections

Objectives

This chapter covers the following Cisco-specific objectives for the “Implement and verify WAN links” section of the 640-802 CCNA exam:

  • Describe different methods for connecting to a WAN

  • Configure and verify a basic WAN serial connection

  • Configure and verify a PPP connection between Cisco routers

  • Troubleshoot WAN implementation issues

Outline

Introduction720
WAN Connection Types720

Leased Lines

721

In the Field

721

Circuit-Switched Networks

721

Packet-Switched Networks

722

Broadband

722

Virtual Private Networks (VPNs)

723

Metropolitan Ethernet (Metro Ethernet)

723
The WAN Physical Layer724
WAN Data Link Encapsulations725

Serial Line Internet Protocol (SLIP)

725

Point-to-Point Protocol (PPP)

726

Cisco High-Level Data Link Control (HDLC)

726

X.25 Link Access Procedure, Balanced (LAPB)

726

Frame Relay

726

Asynchronous Transfer Mode (ATM)

726

PPP over Ethernet (PPPoE) and PPP over ATM (PPPoA)

727
Cisco HDLC727
PPP727

Sub-Layer 1: ISO HDLC

729

Sub-Layer 2: Link Control Protocol (LCP)

729

Authentication

729

Callback

731

Compression

732

Multilink

733

Sub-Layer 3: Network Control Protocol

733
Configuring PPP734

Authentication

734

Compression

736
Verifying PPP737
Troubleshooting PPP738
Chapter Summary741

Key Terms

741
Apply Your Knowledge742

Exercises

742

Review Questions

745

Exam Questions

745

Answers to Review Questions

747

Answers to Exam Questions

748

Suggested Reading and Resources

749



  

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