802.11 Wireless Networks: The Definitive Guide: The Definitive GuideAs we all know by now, wireless networks offer many advantages over fixed (or wired) networks. Foremost on that list is mobility, since going wireless frees you from the tether of an Ethernet cable at a desk. But that's just the tip of the cable-free iceberg. Wireless networks are also more flexible, faster and easier for you to use, and more affordable to deploy and maintain.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:
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From inside the book
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... are present in the header on the data carried in the 802.11 frame. 46 | Chapter3: 802.11MACFundamentals Frame Control Each frame starts with a two-byte Frame Control. This is the Title of the Book, eMatter Edition Frame Format.
... byte Frame Control subfield, shown in Figure 3-10. The components of the Frame Control subfield are: Protocol version ... bytes bits Figure 3-10. Frame controlfield In Table 3-1, bit strings are written most-significant bit first, which ...
... bytes of higher-level data. Implementations must support larger frame bodies to accommodate additional headers for security and QoS. 802.2 LLC headers use 8 bytes for a maximum network protocol payload of 2,296 bytes. Pre- venting ...
... bytes of source and destination MAC address information on Ether- net or the long 802.11 MAC header from the previous section. Ethernet 802.3 LLC, 802.1h 802.3 LLC, RFC1042 MAC headers SNAP DSAP 0xAA 1 Type Copy SNAP SSAP 0xAA 1 3 ...
... byte service access points would be adequate to handle the number of network protocols, but this proved to be an overly optimistic assessment of the state of the world. As a result, SNAP copies the type code from the original Ethernet ...
Contents
1 | |
12 | |
32 | |
67 | |
Wired Equivalent Privacy WEP | 114 |
User Authentication with 8021X | 129 |
Robust Security Networks TKIP and CCMP | 149 |
Management Operations | 170 |
80211 Hardware | 343 |
Using 80211 on Windows | 353 |
80211 on the Macintosh | 373 |
Using 80211 on Linux | 387 |
Using 80211 Access Points | 415 |
Logical Wireless Network Architecture | 438 |
Security Architecture | 476 |
Site Planning and Project Management | 518 |
ContentionFree Service with the PCF | 214 |
Physical Layer Overview | 225 |
The FrequencyHopping FH PHY | 241 |
DSSS and HRDSSS 80211b | 253 |
5GHz OFDM PHY | 276 |
The ExtendedRate PHY ERP | 298 |
MIMOOFDM | 311 |
80211 Network Analysis | 553 |
80211 Performance Tuning | 573 |
Conclusions and Predictions | 585 |
Glossary | 597 |
Index | 598 |