By Alan Holt
Wireless conversation has the benefit of mobility and obviates the necessity for cabling, yet is inherently much less safe and is topic to the heavy law of the radio frequency spectrum. however, the allocation of unlicensed components of the spectrum has facilitated the expansion in instant neighborhood quarter networks (WLANs). WLAN expertise is progressing at a fast speed, however the most generally authorized WLAN average is the IEEE 802.11.
This targeted and hugely functional textual content introduces the foundations of WLANs established upon the IEEE 802.11 criteria, demonstrating easy methods to configure apparatus so as to enforce numerous community ideas. Readers will achieve realizing of the safety implications of instant networks and learn the way vulnerabilities will be mitigated. also, the e-book examines the underlying 802.11 protocols and explains the best way to construct mathematical versions on the way to examine functionality in a WLAN environment.
Topics and Features:
- Presents a pragmatic procedure supported by means of the large use of examples and particular instructions
- Discusses quite a few instant community strategies throughout a few diversified seller structures, together with Cisco Aironet, Alactel-Lucent Omniaccess and Meru Networks
- Provides quite a few mathematical versions for studying the functionality of IEEE 802.11 criteria, and exhibits find out how to construct those versions utilizing Maple
- Examines problems with instant safety and describes the best way to enforce a instant community with firm 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 thoughts and reading how units adapt to alterations within the RF environment.
A hugely beneficial text/reference for pros, undergraduate and graduate-level scholars also will locate this publication an incredible better half 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 at the moment 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 resources for 802.11 Wireless Networks: Security and Analysis
A wireless device can either take local measurements or request measurements taken by a neighbouring device. Radio measurement may be used for a number of applications. 11, devices associate with accesspoints based upon the best signal. This can lead to an uneven distribution of devices amongst access-points. Some access-points will be overloaded while others are underutilised. Location awareness will help to distribute the load more evenly across access-points. As discussed in the previous section, devices operating in the 5 GHz range must perform TPC (transmit power control) and DFS (dynamic frequency selection).
11 Infrastructure Network Fig. 3 Authentication/association state machine sends an authentication request to the access-point and the access-point replies with an authentication response (without verifying the authenticity of the device). 11 also provides a number of cryptographic-based authentication schemes. These are discussed in later chapters. The authentication/association state machine is shown in the diagram in Fig. 3. 38 3 Medium Access Control Prior to authentication/association, devices must identify any access-points that are within range.
EIRP is limited to 200 mW and the maximum mean EIRP spectral density must not exceed 10 mW in any 1 MHz. 725 GHz: Devices in this band can operate both indoors and outdoors and must perform TPC and DFS functions. EIRP is restricted to 1 W with a maximum mean EIRP spectral density not exceeding 50 mW in any 1 MHz band. 25 GHz): Devices are restricted to indoor use. Regulations require the use of an integrated antenna. 25 mW per 1 MHz. If the directional gain of the antenna exceeds 6 dB, then the EIRP and EIRP spectral density needs to be reduced by an amount corresponding to the antenna gain, less 6 dB.
802.11 Wireless Networks: Security and Analysis by Alan Holt