CCNA Exam Prep (Exam 640-802), Second Edition

Chapter 24. Understanding VPN Connectivity

<feature><title>Objectives</title>

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

<objective>

Describe different methods for connecting to a WAN

</objective> <objective>

Describe VPN technology (including: importance, benefits, role, impact, components)

</objective> </feature><feature><title>Outline</title>

Introduction	808
Understanding VPN Connectivity	808
VPN Benefits and Considerations	809
Types of VPNs	810
Site-to-Site VPNs	810
Remote-Access VPNs	811
The Pieces That Make a VPN Tick	814
Understanding IPsec	815
Encryption	816
Diffie-Hellman	818
Secure Socket Layer (SSL)	819
Authentication/Data Integrity	820
IPsec Protocols	821
Chapter Summary ...