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 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 speedy velocity, however the most generally authorised WLAN general is the IEEE 802.11.
This particular and hugely useful textual content introduces the rules of WLANs dependent upon the IEEE 802.11 criteria, demonstrating easy methods to configure gear on the way to enforce a variety of community options. Readers will achieve figuring out of the safety implications of instant networks and find out how vulnerabilities should be mitigated. also, the ebook examines the underlying 802.11 protocols and explains the right way to construct mathematical versions with a purpose to examine functionality in a WLAN environment.
Topics and Features:
- Presents a pragmatic process supported through the vast use of examples and exact instructions
- Discusses quite a few instant community ideas throughout a few diversified seller structures, together with Cisco Aironet, Alactel-Lucent Omniaccess and Meru Networks
- Provides various mathematical types for reading the functionality of IEEE 802.11 criteria, and indicates how one can construct those versions utilizing Maple
- Examines problems with instant safeguard and describes the best way to enforce a instant community with company security
- Investigates the medium entry regulate sub-layer, and types 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 worthwhile text/reference for execs, undergraduate and graduate-level scholars also will locate this ebook an awesome spouse to a college direction on instant networking.
Dr. Alan Holt is leader Technical Officer on the community consultancy corporation IP functionality Ltd., dependent 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 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
WEP could be exploited with minimal effort and know how. Indeed the FMS attack has been incorporated into tools, such as AirSnort and Aircrack. 11i amendment was developed to address the shortcomings of WEP. 11 devices suffered from interoperability problems between vendors when they initially came on the market. The Wi-Fi Alliance was formed to address interoperability issues. 11 equipment. Equipment that passes the compliance test is entitled to bear the Wi-Fi certification logo, which is a registered trademark of the Wi-Fi Alliance.
A MAC frame (see Fig. 4) consists of a number of fields. A description of each field is provided below: Frame control: The frame control field comprises a number of sub-fields. The structure of the frame control field is shown in Fig. 5. These sub-fields are described below: • Protocol Version: Identifies the version of the MAC. There is currently only one standard for the MAC and it is assigned the value 0. • Type: Describes the frame type, either: management, control or data. • Subtype: The context of these values depends upon the type of field (that is, whether the frame is management, control or data).
Devices associate with access-points based upon their power capabilities. The local maximum transmit power level is set by the access-point and relayed to devices using beacon, probe response and association response frames. Furthermore, this level is updated dynamically to reflect changes in the channel conditions. 11h also specifies a transmit-power reporting function. The aim of DFS is to minimise interference in other wireless users in the area. In the 5 GHz range the primary users of this band are radar and satellite communication.