| Terms you'll need to understand: VPN IPSec Symmetric/asymmetric keys DES/3DES/RSA/AES encryption MD5/SHA-1 hashes Diffie-Hellman groups Authentication Header (AH) Encapsulation Security Protocol (ESP) Internet Key Exchange (IKE) Transport and tunnel modes Security Association (SA)
Techniques you'll need to master: Identify the three types of VPNs Determine the appropriate VPN device for businesses Understand the four functions of IPSec Identify ESP and AH tunnel mode versus transport mode Know the five steps of IPSec communication
This chapter introduces many of the protocols and standards that are consistent throughout the entire book. The purpose of this chapter is to help you develop a firm foundation of these technologies, as well as introduce the Cisco hardware platforms that utilize these technologies. |