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

By Matthew Gast

As we know by way of now, instant networks provide many merits over mounted (or stressed) networks. premier on that checklist is mobility, given 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, quicker and more straightforward that you can use, and cheaper to installation and maintain.

The de facto common for instant networking is the 802.11 protocol, along with wireless (the instant average often called 802.11b) and its swifter cousin, 802.11g. With easy-to-install 802.11 community on hand all over the place you switch, the alternative turns out uncomplicated, and plenty of humans dive into instant computing with much less concept and making plans than they'd provide to a stressed community. yet it's clever to be accustomed to either the functions and dangers linked to the 802.11 protocols. And 802.11 instant Networks: The Definitive Guide, 2d version is definitely the right position to start.

This up to date version covers every thing you'll ever want to know approximately instant expertise. Designed with the method administrator or severe domestic person in brain, it's a no-nonsense advisor for establishing 802.11 on home windows and Linux. one of the wide variety of issues coated are discussions on:
* deployment issues
* community tracking and function tuning
* instant defense concerns
* how one can use and choose entry issues
* community tracking necessities
* instant card configuration
* safeguard matters particular to instant networks
With instant know-how, the benefits to its clients are certainly ample. businesses now not need to care for the trouble and fee of wiring constructions, and families with numerous pcs can keep away from fights over who's on-line. And now, with 802.11 instant Networks: The Definitive Guide, 2d variation, you could combine instant know-how into your present infrastructure with the maximum self assurance.

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

Example text

In an infrastructure network, stations must associate with an access point to obtain network services. 11 network; it is logically equivalent to plugging in the network cable on an Ethernet. It is not a symmetric process. Mobile stations always initiate the association process, and access points may choose to grant or deny access based on the contents of an association request. 11 standard places no limit on 14 the number of mobile stations that an access point may serve. Implementation considerations may, of course, limit the number of mobile stations an access point may serve.

As an experiment on one of my trips to San Francisco, I turned on my laptop to count the number of wireless networks near a major highway outside the city. I found eight without expending any significant effort. A significantly more motivated investigator would undoubtedly have discovered many more networks by using a much more sensitive antenna mounted outside the steel shell of the car. 2 A Network by Any Other Name... Wireless networking is a hot industry segment. Several wireless technologies have been targeted primarily for data transmission.

However, the bridge is a component of the distribution system. 11 MAC that are closely tied to its interaction with the distribution system. 1 Inter-access point communication as part of the distribution system Included with this distribution system is a method to manage associations. A wireless station is associated with only one access point at a time. If a station is associated with one access point, all the other access points in the ESS need to learn about that station. In Figure 2-5, AP4 must know about all the stations associated with AP1.

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