Logical Wireless Network Architecture

Planning a wireless LAN installation is a significant undertaking that cuts across many previously disparate disciplines. This chapter begins the discussion of wireless LAN deployment by tackling the network architecture. Network design is about trade-offs between several factors, including cost, manageability, availability, and performance. Wireless networks add the additional dimension of mobility to the mix.

Wireless networks often extend an existing wired infrastructure. The wired infrastructure may be quite complex to begin with, especially if it spans several buildings in a campus setting. Wireless networks depend on having a solid, stable, well-designed wired network in place. If the existing network is not stable, chances are the wireless extension is doomed to instability as well.

This chapter discusses four approaches to building a wireless LAN. All are discussed in terms of the technical features of wireless LANs that influence how you design your wireless network. How do the features of wireless LANs influence network topology? Besides the 802.11 equipment, what other equipment is needed to deploy a network? How should the logical network be constructed for maximum mobility?

Introduction to Wireless Networking

Overview of 802.11 Networks

11 MAC Fundamentals

11 Framing in Detail

Wired Equivalent Privacy (WEP)

User Authentication with 802.1X

11i: Robust Security Networks, TKIP, and CCMP

Management Operations

Contention-Free Service with the PCF

Physical Layer Overview

The Frequency-Hopping (FH) PHY

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

11a and 802.11j: 5-GHz OFDM PHY

11g: The Extended-Rate PHY (ERP)

A Peek Ahead at 802.11n: MIMO-OFDM

11 Hardware

Using 802.11 on Windows

11 on the Macintosh

Using 802.11 on Linux

Using 802.11 Access Points

Logical Wireless Network Architecture

Security Architecture

Site Planning and Project Management

11 Network Analysis

11 Performance Tuning

Conclusions and Predictions

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802.11 Wireless Networks The Definitive Guide
802.11 Wireless Networks: The Definitive Guide, Second Edition
ISBN: 0596100523
EAN: 2147483647
Year: 2003
Pages: 179
Authors: Matthew Gast
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