By Alan Holt
Wireless communique has the benefit of mobility and obviates the necessity for cabling, yet is inherently much less safe and is topic to the heavy rules of the radio frequency spectrum. however, the allocation of unlicensed components of the spectrum has facilitated the expansion in instant neighborhood region networks (WLANs). WLAN expertise is progressing at a swift velocity, however the most generally authorized WLAN general is the IEEE 802.11.
This particular and hugely useful textual content introduces the foundations of WLANs dependent upon the IEEE 802.11 criteria, demonstrating tips to configure gear with a purpose to enforce numerous community options. Readers will achieve figuring out of the safety implications of instant networks and learn the way vulnerabilities should be mitigated. also, the ebook examines the underlying 802.11 protocols and explains the best way to construct mathematical types so as to examine functionality in a WLAN environment.
Topics and Features:
- Presents a pragmatic procedure supported by means of the large use of examples and specified instructions
- Discusses a variety of instant community options throughout a few varied seller structures, together with Cisco Aironet, Alactel-Lucent Omniaccess and Meru Networks
- Provides various mathematical types for examining the functionality of IEEE 802.11 criteria, and indicates the right way to construct those versions utilizing Maple
- Examines problems with instant safety and describes tips to enforce a instant community with company security
- Investigates the medium entry keep watch over sub-layer, and versions for functionality research of the MAC layer
- Reviews the actual sub-layers of 802.11, describing modulation innovations and analyzing how units adapt to adjustments within the RF environment.
A hugely invaluable text/reference for execs, undergraduate and graduate-level scholars also will locate this e-book an excellent better half to a school 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 at the moment a software program advisor at the Airbus undertaking in Bristol. She used to be previously Operations supervisor for DL Consulting, New Zealand.
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Additional info for 802.11 Wireless Networks: Security and Analysis
Radio antennas can be thought of as transmission lines that have been configured for the purpose of efficiently transmitting energy from the conductors into free-space (see Fig. 3). The propagation of radio waves is governed by frequency. Below 2 MHz, radio waves propagate as ground waves. Ground waves follow the contours of the Earth. For frequencies between 2 and 30 MHz, sky wave propagation is the dominant mode. Radio signals are refracted by the ionosphere. Long range coverage can be achieved; however, the range is dependent upon frequency, time of day and the season.
5 Summary Radio waves belong to the subset of the electromagnetic radiation below infrared. At the upper part of the radio band are microwaves which range from 300 MHz to 300 GHz. 11 devices operate in microwave bands. In this chapter, we have discussed how radio waves propagation and their effect of wireless communication systems. 11 WLANs. These techniques are subject to a great deal of research and will, hopefully, lead to more effective use of the radio spectrum. The radio spectrum is a valuable resource for many sectors, including broadcasting, mobile telephony, aviation, public transport, navigation and defence.
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. The radio spectrum is divided into bands and allocated to a particular service, such as broadcasting, radio astronomy, radar or telecommunications. The UK, for example, regulates the radio frequency spectrum from 9 kHz to 275 GHz and publishes the frequency allocation table in .
802.11 Wireless Networks: Security and Analysis by Alan Holt