Optimizing and testing WLANs: proven techniques for maximum by Tom Alexander

By Tom Alexander

As WLANs (Wireless neighborhood region Networks) develop into more and more universal, it is turning into very important on the way to attempt them for correct functionality and to optimize their operation. This publication, written by means of a member of the IEEE committee that develops WLAN criteria, is the 1st e-book addressing that desire. It covers attempt gear and strategies for the RF (wireless) and actual layers of WLAN, protocols, the appliance layer, and production trying out. The emphasis all through is on underlying engineering ideas besides glossy metrics and methodologies, making sure this booklet supplies either a fantastic theoretical historical past in addition to field-proven innovations and purposes. a lot of the subject matter is drawn from the author's personal hands-on event within the box, as an architect and engineer of WLAN try gear, and a author of criteria for measuring WLAN gear functionality. a very attractive bankruptcy bargains with production try out, describing a number of the varied production try out setups and kit. A concise advent to deployment trying out of "hotspots" and WLANs in companies can be supplied. *Gives confirmed options for maximizing the assurance sector and function of instant networks *Author's insider place at the IEEE committee constructing criteria for WLAN trying out guarantees timeliness and technical integrity of the cloth *Includes insurance of more recent a number of input/multiple output (MIMO) instant networks

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As previously mentioned the CAPWAP group at IETF is standardizing this protocol. In all cases, however, the protocol provides for the following basic functions: 1. discovery of the WLAN switch by the APs, and discovery of the APs by the WLAN switch; 2. firmware download to the AP; 3. ); 4. transport of client association and security information; 5. transport of client data, in cases where the data path as well as the control path passes through the WLAN switch. 4 The RF Layer The RF layer of the WLAN protocol is, of course, the raison d’etre of every WLAN device; it is this layer that provides the “wireless” connectivity that makes the technology attractive.

N. Maintenance: All enterprise networks require ongoing maintenance and upgrade, as requirements change, users come and go, and equipment needs to be updated. This is usually the domain of the enterprise IT staff, who use software tools to monitor the health of the infrastructure and clients. In some cases – particularly in Internet service provider networks – active monitoring is done, where TGAs are used to run periodic performance and functionality checks on the running infrastructure, using some of the protocol tests described in this book.

Broadcasting “beacons” to indicate their presence and abilities, so that clients can scan for and find them. 2. Supporting association by clients, as well as the security handshakes required by whatever security scheme is being used. 11i standards; instead, they establish a secure connection to a RADIUS server and pass these packets on. 3. Bridging and packet translation of data packets sent to or received from connected clients. 4. 11 power management protocol to conserve battery life. 15 Chapter 1 In many cases, APs also participate in “RF layer management”, especially in large enterprise deployments.

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