Introduction

Wireless LAN technology is now a widespread phenomenon. Hotspots are being deployed across the country, enterprises are unleashing themselves into wireless territory, and home users are setting up wireless networks in record number.

This chapter is designed to tell you a little more about 802.11—where it came from, where it's going, and how it works. We will also take a closer look at the 802.11 protocol itself, along with some of the design decisions that went into the specification. Developing a solid understanding of the underlying protocol is an essential foundation for comprehending and applying the security concepts reviewed later in this book. After all, you have to learn how to walk before you can run. This chapter will help you get on your toes and have you sprinting in no time.