New PDF release: 802.11 Wireless Networks: The Definitive Guide (2nd Edition)

By Matthew Gast

ISBN-10: 0596100523

ISBN-13: 9780596100520

As we know by means of now, instant networks provide many benefits over mounted (or stressed out) networks. premiere on that checklist is mobility, on account that going instant frees you from the tether of an Ethernet cable at a table. yet that's simply the end of the cable-free iceberg. instant networks also are extra versatile, swifter and more straightforward that you can use, and more cost-effective to installation and maintain.

The de facto normal for instant networking is the 802.11 protocol, such as wireless (the instant general referred to as 802.11b) and its swifter cousin, 802.11g. With easy-to-install 802.11 community on hand in all places you switch, the alternative turns out easy, and plenty of humans dive into instant computing with much less inspiration and making plans than they'd supply to a stressed out community. yet it's clever to be accustomed to either the features and hazards linked to the 802.11 protocols. And 802.11 instant Networks: The Definitive Guide, 2d variation is definitely the right position to start.

This up to date version covers every little thing you'll ever want to know approximately instant know-how. Designed with the procedure administrator or critical domestic person in brain, it's a no-nonsense consultant for establishing 802.11 on home windows and Linux. one of the wide selection of issues coated are discussions on:
* deployment issues
* community tracking and function tuning
* instant protection concerns
* easy methods to use and choose entry issues
* community tracking necessities
* instant card configuration
* protection matters targeted to instant networks
With instant know-how, the benefits to its clients are certainly considerable. businesses not need to take care of the effort and fee of wiring structures, and families with a number of pcs can stay away from fights over who's on-line. And now, with 802.11 instant Networks: The Definitive Guide, 2d variation, you could combine instant expertise into your present infrastructure with the maximum self belief.

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Additional resources for 802.11 Wireless Networks: The Definitive Guide (2nd Edition)

Example text

11 network. Stations can move while connected to the network and transmit frames while in motion. Mobility can cause one of three types of transition: No transition When stations do not move out of their current access point's service area, no transition is necessary. ) [6] Although my explanation makes it sound as if the "no motion" and "local motion" substates are easily distinguishable, they are not. The underlying physics of RF propagation can make it impossible to tell whether a station is moving because the signal strength can vary with the placement of objects in the room, which, of course, includes the people who may be walking around.

The three access points in the picture are all assigned to the same ESS. 11 network card is sitting within AP1's basic service area and is associated with AP1. When the laptop moves out of AP1's basic service area and into AP2's at t=2, a BSS transition occurs. The mobile station uses the reassociation service to associate with AP2, which then starts sending frames to the mobile station. BSS transitions require the cooperation of access points. In this scenario, AP2 needs to inform AP1 that the mobile station is now associated with AP2.

Any active network connections are likely to be dropped when the mobile station leaves the first ESS. Figure 2-10. ESS transition 22 Chapter 3. 11 standard in depth. Chapter 2 provided a high-level overview of the standard and discussed some of its fundamental attributes. You are now at a fork in the book. 11 specifications. It is possible, however, to build a wired network without a thorough and detailed understanding of the protocols, and the same is true for wireless networks. 11 has been widely and rapidly adopted, security issues have continued to grab headlines.

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802.11 Wireless Networks: The Definitive Guide (2nd Edition) by Matthew Gast


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