Building Secure Wireless Networks with 802.11 by Jahanzeb Khan

By Jahanzeb Khan

* offers a step by step technique for making plans and imposing a instant LAN according to 802.11 instant constancy (Wi-Fi) know-how * Authors are wireless protection specialists who're in a position to deal with the firestorm of issues approximately defense for 802.11b networks * bargains a transparent viewpoint of interoperability with comparable instant criteria like 802.11a, HomeRF, and Bluetooth * Explains the right way to in attaining an identical functionality as a stressed Ethernet connection and carry flexibility and excessive velocity

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DSSS avoids interference by configuring the spreading function in the receiver to concentrate the desired signal and spread out and dilute any interfering signal. There is a lot of overhead involved with spread spectrum, and so most of the DSSS and FHSS systems historically have lower data rates than infrared− or microwave−based systems. • Direct−sequence spread spectrum (DSSS). 6). The data is transmitted by first modulating a random binary string called spreading code on the carrier wave (the chosen electromagnetic frequency).

2: Data transmission over carrier waves. For a wireless network to be successful, it must be reliable, safe, secure, fast, and easy to deploy. In the next section, we describe the architecture of a wireless LAN. Basic Architecture of a Wireless LAN A wireless LAN can be deployed in many ways, depending on the architecture it is built on. There are many wireless devices available today, so it is best to choose devices that interoperate when building a wireless LAN. This section explains wireless LAN hardware, including wireless network adapters and access points.

31 In Europe, a Swedish scientist named Östen Mäkitalo, also known as "Mr. Mobile," is considered the brain behind the first wireless network. Östen was working as the research and development director of Sweden's national telephone company, Televerket (Telia), when he was asked to develop a common system for connecting the mobile phones in all of the Scandinavian countries. He brought in research teams from Denmark, Norway, and Finland and created the Nordic Mobile Telephone (NMT) system, which was launched in 1981.

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