By Alan Holt
Wireless communique has the good thing about mobility and obviates the necessity for cabling, yet is inherently much less safe and is topic to the heavy legislation of the radio frequency spectrum. however, the allocation of unlicensed elements of the spectrum has facilitated the expansion in instant neighborhood region networks (WLANs). WLAN expertise is progressing at a swift speed, however the most generally permitted WLAN normal is the IEEE 802.11.
This certain and hugely sensible textual content introduces the rules of WLANs dependent upon the IEEE 802.11 criteria, demonstrating how you can configure apparatus for you to enforce a variety of community strategies. Readers will achieve realizing of the safety implications of instant networks and learn the way vulnerabilities may be mitigated. also, the booklet examines the underlying 802.11 protocols and explains the best way to construct mathematical types so that it will examine functionality in a WLAN environment.
Topics and Features:
- Presents a pragmatic method supported by means of the large use of examples and specified instructions
- Discusses a number of instant community suggestions throughout a couple of diverse seller structures, together with Cisco Aironet, Alactel-Lucent Omniaccess and Meru Networks
- Provides various mathematical versions for examining the functionality of IEEE 802.11 criteria, and indicates easy methods to construct those types utilizing Maple
- Examines problems with instant safety and describes the best way to enforce a instant community with company security
- Investigates the medium entry regulate sub-layer, and versions for functionality research of the MAC layer
- Reviews the actual sub-layers of 802.11, describing modulation concepts and interpreting how units adapt to alterations within the RF environment.
A hugely worthy text/reference for execs, undergraduate and graduate-level scholars also will locate this booklet an awesome significant other to a college direction on instant networking.
Dr. Alan Holt is leader Technical Officer on the community consultancy corporation IP functionality Ltd., established in Bristol, united kingdom. he's writer of the preferred Springer textual content Network functionality research: utilizing the J Programming Language.
Dr. Chi-Yu Huang works for Tata applied sciences Ltd., and is presently a software program advisor at the Airbus venture in Bristol. She was once previously Operations supervisor for DL Consulting, New Zealand.
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Extra info for 802.11 Wireless Networks: Security and Analysis
3 Radio Frequency Regulation The radio spectrum is a public resource and subject to strict regulation. National regulatory bodies are responsible for controlling radio emissions and frequency use. In the UK, for example, the regulatory body is OFCOM. In the US, regulatory control is divided between the Federal Communications Commission (FCC) for commerce 28 2 Radio Frequencies Fig. 11 Ricean probability density function, for various values of u and σ = 1 and the National Telecommunications Information Administration (NTIA) for government.
If the data frame is received correctly, the receiving device responds (after pausing for a SIFS) with an ACK before the NAV expires. The basic DCF transmission method is illustrated in Fig. 6. Sending data under the collision avoidance method involves a four-way frame exchange whereby a device attempts to reserve the RF channel prior to sending data. Communication is initiated with an RTS (ready-to-send) frame (upon sensing the RF channel is idle). When the recipient receives the RTS frame, it waits for a SIFS and then transmits a CTS (clear-to-send).
11 infrared devices, however, did not achieve much commercial success, so we will confine our attention to radio wave frequencies. Radio wave frequencies range from a few hertz to 300 GHz. Wireless LAN communication systems operate within a range of frequencies commonly known as microwaves. Microwaves are a subset of radio waves that cover the EHF, SHF and UHF bands. 2 Radio Waves All electronic circuits radiate RF energy. Consider the circuit in Fig. 2, connecting an RF source to a load by a transmission line.
802.11 Wireless Networks: Security and Analysis by Alan Holt
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