By Thomas Maufer
During this ebook, best-selling networking writer Thomas Maufer explains how instant LANs paintings, and the way to cause them to paintings for you-reliably and securely. Maufer takes you less than the hood with modern day newest WLAN applied sciences, providing functional perception and context for deploying, dealing with, and troubleshooting WLANs in any atmosphere, from the firm to the home.Covers all best IEEE 802.11 instant criteria: 802.11a, 802.11b, 802.11g, and 802.11i/WPAShows easy methods to installation small, mid-sized, huge, public, company, and residential networksProvides pattern Windows(R), Linux(R), and MacOS(R) configurations that assist you start quicklyDemystifies WLAN safety so that you can know the way to guard your dataIlluminates the 802.11 protocol so that you can troubleshoot extra effectivelyPreviews tomorrow's WLAN criteria and purposes for enterprise 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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Extra info for A Field Guide to Wireless LANs for Administrators and Power Users
The OSI-RM's seven abstract layers each perform a specific function. Layers 2 through 6 (the middle layers) have a common characteristic, in that they perform a service (or set of services) for the layer above, and expect a service (or set of services) from the layer below. In other words, they are simultaneously "clients" of the layer below, while they offer "services" to the layer above. The reason that layer 1 and layer 7 are different is that they have no layer below or no layer above, respectively.
Full- or half-duplex). However, this negotiation happens below the MAC sub-layer. 11. [ Team LiB ] [ Team LiB ] Summary We have seen that the landscape of networking standards is littered with a figurative alphabet soup of standards bodies and their output. The Data Link layer is only one of the seven layers of the OSI-RM, an abstract model of a layered protocol stack. The TCP/IP protocol suite is much less formal than the OSI-RM, but layers similar functions in hierarchically similar ways. The IEEE has developed numerous standards at the Data Link layer, and in doing so has created the logical partition of the Data Link layer into the Logical Link Control (LLC) and Medium Access Control (MAC) sub-layers.
11 is one example of a MAC sub-layer protocol that supports a primitive type of reliability, yet it is a connectionless protocol. The Network Layer The Physical layer is completely unconcerned with the structure of the bit-stream that it is carrying. In that respect, the Physical layer is unaware of its payload. The Data Link layer is similarly unaware of a frame's payload, which is commonly a Network layer protocol, or some other "client" protocol of the Data Link layer, 36 37 such as a control or setup protocol.