802.11 Wireless Networks: The Definitive Guide, Second by Matthew S. Gast PDF

By Matthew S. Gast

This can be a nice publication for wireless method engineers to appreciate 802.11 a\b\g PHY and MAC. The publication not just talks approximately theoretical stuff but additionally provides sensible elements of wireless networking.

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Extra info for 802.11 Wireless Networks: The Definitive Guide, Second Edition

Sample text

11F, but I am not aware of its use in any products. Wireless bridges and the distribution system Up to this point, I have tacitly assumed that the distribution system medium was an existing fixed network. 11 specification explicitly supports using the wireless medium itself as the distribution system. The wireless distribution system (WDS) configuration is often called a "wireless bridge" configuration because it allows network engineers to connect two LANs at the link layer. Wireless bridges can be used to quickly connect distinct physical locations and are well-suited for use by access providers.

11, the introduction serves another important purpose. 11 is superficially similar to Ethernet. 11 adapts traditional Ethernet technology to a wireless world. 11, a number of additional management features were added. 11 is a white lie about the meaning of media access control (MAC). Wireless network interface cards are assigned 48-bit MAC addresses, and, for all practical purposes, they look like Ethernet network interface cards. 11 cards have unique addresses even when deployed into a network with wired Ethernet stations.

11 and Ethernet stem from the differences in the underlying medium. This chapter provides some insight into the motivations of the MAC designers by describing some challenges they needed to overcome and describes the rules used for access to the medium, as well as the basic frame structure. 11 network, skip ahead to the end of this chapter. 11 standard; detailed MAC state diagrams are in Annex C. Challenges for the MAC Differences between the wireless network environment and the traditional wired environment create challenges for network protocol designers.

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