By Thomas Maufer
During this ebook, best-selling networking writer Thomas Maufer explains how instant LANs paintings, and the way to lead them to paintings for you-reliably and securely. Maufer takes you less than the hood with modern-day newest WLAN applied sciences, supplying useful perception and context for deploying, coping with, and troubleshooting WLANs in any atmosphere, from the company to the home.Covers all major IEEE 802.11 instant criteria: 802.11a, 802.11b, 802.11g, and 802.11i/WPAShows the right way to set up small, mid-sized, huge, public, enterprise, and residential networksProvides pattern Windows(R), Linux(R), and MacOS(R) configurations that assist you start quicklyDemystifies WLAN protection so that you can know how to guard your dataIlluminates the 802.11 protocol so that you can troubleshoot extra effectivelyPreviews tomorrow's WLAN criteria and purposes for company and residential (IEEE 802.11j and 802.11n)Whether you are a network/system administrator or an influence person, Thomas Maufer demystifies instant LAN technology... so that you can maximize the advantages whereas minimizing the hassles.
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Additional info for A Field Guide to Wireless LANs for Administrators and Power Users
33 34 The protocol stack manifests itself in a nested series of headers that are prefixed to data that is passed down from the layer above, as illustrated in Figure 2-4. In the ideal case, the extra header added by each layer is treated as if it were data by the layer(s) below. In practice, it is occasionally more efficient to peek into the next higher-layer protocol's header to make more accurate forwarding decisions, but that is an implementation choice and doesn't change the basic model described here, in which each layer adds its own header.
Many popular IETF protocols seem to prefer ASCII-coded human-readable protocol exchanges, such as are used to exchange commands between peer entities using the File Transfer Protocol (FTP), HyperText Transfer Protocol (HTTP), and the Simple Mail Transfer Protocol (SMTP). The Presentation layer could also support compression, encryption, or almost any other conceivable transformation of the application's data stream that might be generically useful (application-specific data representations can also be supported).
953280000 Gbps). The payload capacity of an OC-192 circuit is about 4 percent less than the bit transmission speed, due to the overhead of framing and other PHY layer signaling and control information.  As of early 2003, there are several fiber-based PHYs and a short-range copper PHY, but no 10GBASE-T has yet been defined, although discussions in that direction have already begun. It remains to be seen whether a practical 10GBASE-T standard will emerge, or 43 44 whether the world will finally begin to use optical fiber instead of twisted pair wiring.
A Field Guide to Wireless LANs for Administrators and Power Users by Thomas Maufer