View Larger Image	Matthew S. Gast O'Reilly Media, Paperback, 2nd edition, Published April 2005, 630 pages, ISBN 0596100523
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• Networking/Communications : Wireless

• O'Reilly Media

The de facto standard for wireless networking is the 802.11 protocol, which includes Wi-Fi (the wireless standard known as 802.11b) and its faster cousin, 802.11g. With easy-to-install 802.11 network hardware available everywhere you turn, the choice seems simple, and many people dive into wireless computing with less thought and planning than they'd give to a wired network. But it's wise to be familiar with both the capabilities and risks associated with the 802.11 protocols. And 802.11 Wireless Networks: The Definitive Guide, 2nd Edition is the perfect place to start.

This updated edition covers everything you'll ever need to know about wireless technology. Designed with the system administrator or serious home user in mind, it's a no-nonsense guide for setting up 802.11 on Windows and Linux. Among the wide range of topics covered are discussions on:

• deployment considerations
  
• network monitoring and performance tuning
  
• wireless security issues
  
• how to use and select access points
  
• network monitoring essentials
  
• wireless card configuration
  
• security issues unique to wireless networks

With wireless technology, the advantages to its users are indeed plentiful. Companies no longer have to deal with the hassle and expense of wiring buildings, and households with several computers can avoid fights over who's online. And now, with 802.11 Wireless Networks: The Definitive Guide, 2nd Edition, you can integrate wireless technology into your current infrastructure with the utmost confidence.

Table of Contents

Foreword

Preface

1. Introduction to Wireless Networking

Why Wireless?
What Makes Wireless Networks Different
A Network by Any Other Name...

2. Overview of 802.11 Networks

IEEE 802 Network Technology Family Tree
802.11 Nomenclature and Design
802.11 Network Operations
Mobility Support

3. 802.11 MAC Fundamentals

Challenges for the MAC
MAC Access Modes and Timing
Contention-Based Access Using the DCF
Fragmentation and Reassembly
Frame Format
Encapsulation of Higher-Layer Protocols Within 802.11
Contention-Based Data Service
Frame Processing and Bridging

4. 802.11 Framing in Detail

Data Frames
Control Frames
Management Frames
Frame Transmission and Association and Authentication States

5. Wired Equivalent Privacy (WEP)

Cryptographic Background to WEP
WEP Cryptographic Operations
Problems with WEP
Dynamic WEP

6. User Authentication with 802.1X

The Extensible Authentication Protocol
EAP Methods
802.1X: Network Port Authentication
802.1X on Wireless LANs

7. 802.11i: Robust Security Networks, TKIP, and CCMP

The Temporal Key Integrity Protocol (TKIP)
Counter Mode with CBC-MAC (CCMP)
Robust Security Network (RSN) Operations

8. Management Operations

Management Architecture
Scanning
Authentication
Preauthentication
Association
Power Conservation
Timer Synchronization
Spectrum Management

9. Contention-Free Service with the PCF

Contention-Free Access Using the PCF
Detailed PCF Framing
Power Management and the PCF

10. Physical Layer Overview

Physical-Layer Architecture
The Radio Link
RF Propagation with 802.11
RF Engineering for 802.11

11. The Frequency-Hopping (FH) PHY

Frequency-Hopping Transmission
Gaussian Frequency Shift Keying (GFSK)
FH PHY Convergence Procedure (PLCP)
Frequency-Hopping PMD Sublayer
Characteristics of the FH PHY

12. The Direct Sequence PHYs: DSSS and HR/DSSS (802.11b)

Direct Sequence Transmission
Differential Phase Shift Keying (DPSK)
The "Original" Direct Sequence PHY
Complementary Code Keying
High Rate Direct Sequence PHY

13. 802.11a and 802.11j: 5-GHz OFDM PHY

Orthogonal Frequency Division Multiplexing (OFDM)
OFDM as Applied by 802.11a
OFDM PLCP
OFDM PMD
Characteristics of the OFDM PHY

14. 802.11g: The Extended-Rate PHY (ERP)

802.11g Components
ERP Physical Layer Convergence (PLCP)
ERP Physical Medium Dependent (PMD) Layer

15. A Peek Ahead at 802.11n: MIMO-OFDM

Common Features
WWiSE
TGnSync
Comparison and Conclusions

16. 802.11 Hardware

General Structure of an 802.11 Interface
Implementation-Specific Behavior
Reading the Specification Sheet

17. Using 802.11 on Windows

Windows XP
Windows 2000
Windows Computer Authentication

18. 802.11 on the Macintosh

The AirPort Extreme Card
802.1X on the AirPort

19. Using 802.11 on Linux

PCMCIA Support on Linux
Linux Wireless Extensions and Tools
Agere (Lucent) Orinoco
Atheros-Based cards and MADwifi
802.1X on Linux with xsupplicant

20. Using 802.11 Access Points

General Functions of an Access Point
Power over Ethernet (PoE)
Selecting Access Points
Cisco 1200 Access Point
Apple AirPort

21. Logical Wireless Network Architecture

Evaluating a Logical Architecture
Topology Examples
Choosing Your Logical Architecture

22. Security Architecture

Security Definition and Analysis
Authentication and Access Control
Ensuring Secrecy Through Encryption
Selecting Security Protocols
Rogue Access Points

23. Site Planning and Project Management

Project Planning and Requirements
Network Requirements
Physical Layer Selection and Design
Planning Access-Point Placement
Using Antennas to Tailor Coverage

24. 802.11 Network Analysis

Network Analyzers
Ethereal
802.11 Network Analysis Checklist
Other Tools

25. 802.11 Performance Tuning

802.11 Performance Calculations
Improving Performance
Tunable 802.11 Parameters

26. Conclusions and Predictions

Standards Work
Current Trends in Wireless Networking
The End

Glossary

Index

About the Author

Matthew Gast currently works for an advanced wireless network systems company in the Bay Area. Prior to that, he spent several years as an engineer for a series of network security companies. He is the author of 802.11 Wireless Networks: The Definitive Guide, Network Printing, and T1: A Survival Guide.

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