Wi-Fi (802.11) Network Handbook

Overview

Break free with the wireless networking capabilities of 802.11. This comprehensive and well-written guide provides hardware advice, radio frequency fundamentals, performance tips, architecture requirements, and more. Provides clarity on connectivity issues for laptop computers, personal digital assistants (PDAs), and peripherals.
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Overview

Break free with the wireless networking capabilities of 802.11. This comprehensive and well-written guide provides hardware advice, radio frequency fundamentals, performance tips, architecture requirements, and more. Provides clarity on connectivity issues for laptop computers, personal digital assistants (PDAs), and peripherals.
Read More Show Less

Product Details

  • ISBN-13: 9780072226232
  • Publisher: McGraw-Hill/OsborneMedia
  • Publication date: 12/5/2002
  • Series: Networking Ser.
  • Edition number: 1
  • Pages: 388
  • Product dimensions: 0.80 (w) x 7.50 (h) x 9.25 (d)

Table of Contents

Acknowledgments xiii
Foreword xvii
Preface xix
Part I Moving from Wired to Wireless Networks
1 A Brief History of Wireless LANs 3
Radio, the Foundation of the Wireless LAN 4
A Founding Mother of Wireless LANs 5
Wireless Data Acquisition Systems: The Precursors of the Wireless LAN 7
The First Wireless LANs 9
802.11: The First Wireless LAN Standard 11
2 A Summary of Common WLAN Standards 13
Globalization of Standards 14
Early Technology Adopters vs. Standards 16
Technological Maturity 17
Stability of Basic Design 17
Interoperability 17
How 802.11 and Other Standards Are Developed 18
Introduction of New Technology 18
Relatively High Interest by Developers 19
Deployment of Technology to Early Adopters 19
Standards Definition by One or More Technology Providers 20
Establishment of Standard by Standards Body 20
Ratification of Standard by Technology Providers 21
Institute of Electrical and Electronics Engineers 22
Wireless Ethernet Compatibility Alliance and Wi-Fi 27
Competing WLAN Standards 28
The 802.11 Standard 30
The HomeRF Standard 34
The BlueTooth Standard 35
3 Understanding Radio Frequency Fundamentals 37
Frequency Basics 40
Power Transmission 41
Frequency Bands 44
Modulation 44
Spreading Techniques 50
Duplexing Techniques 60
Error Control 61
Earth Curvature Calculation for 802.11 Bridges 64
4 The RF Physical Layer 65
The RF Physical Layer--Layer 1 66
The Fundamental Radio Elements 66
The Radio 67
The 802.11 Radio 67
The Primary MAC Layer Functions 74
Antennas 78
Part II Designing Your Enterprise Wireless LAN
5 Performance, Architechtural, and Interoperability Considerations 91
Wi-Fi Performance 93
The Data Rates Supported by Wi-Fi 93
What Really Matters: Throughput 97
Going the Distance: Range 110
Interoperability 115
Checklist 117
6 802.11a and 802.11g: High Performance Wireless LAN Standards 119
Orthogonal Frequency Division Multiplexing 121
Different Bands, Different Benefits 123
Checklist 135
7 Understanding the Regulatory Environment 137
They're Here to Help: The Regulatory Agencies Applicable to Wi-Fi 138
Regulatory Domains 138
The FCC Regulatory Domain 140
The ETSI Domain 148
The Japanese Regulatory Domain 152
Other Regulatory Domains 153
Checklist 153
Part III WLAN Equipment and Component Selection
8 Selecting the Right Wireless LAN Equipment Components 157
Defining the WLAN Requirements 158
Migrations of the Technology 159
Defining Your Technology Requirements 161
Selecting Necessary WLAN Services 164
Hardware Selection of the Access Point 166
Single or Dual Radio Architecture 168
Selecting the Client Product 171
Summary 172
Part IV Integrating WLAN into Your Network Infrastructure
9 Wireless LANs in the Enterprise 175
What Is the Enterprise? 176
Wi-Fi Deployment in the Enterprise 178
Designating Areas 178
Capacity Planning 183
Coverage Planning: The Site Survey 186
Wi-Fi Management in the Enterprise 199
Maintaining the Infrastructure 200
Monitoring the Infrastructure 202
Checklist 202
10 Wireless LANs in Small, Branch, and Home Offices 205
The Primary Issues to Consider When Selecting 802.11 Equipment 206
How Will the WLAN Be Used? 207
Which Protocol--11b, 11a, or 11g? 208
How Many Access Points? 209
Which Vendor to Select for Access Points and Client Adapters? 209
Which Antennas to Select for the Access Points and Client Adapters? 213
What Security Protocol to Use? 214
Self-Installation or Professional Installation? 215
Who to Call If the Network Goes Down? 215
Where to Acquire Training for the Devices for Deployment and Use? 215
Summary 216
11 Wi-Fi Security Best Practices 217
Authentication and Encryption 218
Authentication 218
Encryption 222
WEP: When Equivalency Isn't Equal 224
802.1X Authentication 229
Dynamic Encryption Keys 231
The 802.11i Standard 233
Different Types of Security for Different Applications 239
Checklist 242
12 QoS in Wireless LANs 243
Identifying Time-Sensitive Traffic 246
Prioritizing Traffic 247
The 802.11e Standard and WME 247
Enhanced Distributed Control Function 249
Hybrid Control Function 251
Checklist 253
Part V 802.11 and the Last Mile
13 Hotspots: Public Access of Wireless LANs 257
Where's the Wi-Fi? 258
Business Models for Hotspots 260
Settlements and Billing 261
Regulatory Issues 263
Early Wi-Fi Service Providers 264
Checklist 265
14 802.11 In the Service Provider Market 267
U-NII, 802.11a and the Last Mile 268
802.11 As Final Mile for Fiber Lateral Bypass 280
802.11 for Extension of DSL and Cable 281
Practical Considerations for Using 802.11b for Final Mile 281
Two Notes of Advice for Final Mile and Service Providers 285
Venture Capital Aspects of Unlicensed vs. Licensed Spectrum 287
A Audio, Video, Voice, and Data to a PDA over 802.11 at a Nuclear Power Plant 291
General Site and Industry Considerations 292
Site Survey Considerations 295
Hardware 305
Software 306
Security 307
802.11 Network Uses 309
B Glossary 311
Index 345
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