By Bruce Alexander
802.11 instant community website Surveying and install starts off with an advent to WLAN architectures and definitions after which strikes directly to website survey methodologies, supporting you determine and tackle your site's particular wishes. The publication delves into the deploy technique for WLAN apparatus, together with the foundations and laws to which WLANs needs to adhere, a variety of stumbling blocks that come up while fitting WLAN apparatus, and how you can attach WLAN items to the stressed out community. 802.11 instant community web site Surveying and install is the complete advisor to acting a WLAN web site survey and effectively fitting your 802.11 instant network.This e-book is a part of the Networking know-how sequence from Cisco Press, which bargains networking pros useful info for developing effective networks, knowing new applied sciences, and construction profitable careers.
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Additional resources for 802.11 wireless network site surveying and installation
The reflector concentrates and intensifies the light beam in a particular direction. This is very similar to what a dish antenna does to an RF signal. In RF, you usually have to give up one thing to gain something else. In antenna gain, this comes in the form of coverage area or what is known as beamwidth. As the gain of an antenna goes up, the beamwidth (usually) goes down. An isotropic antenna's coverage can be thought of as a perfect round balloon. It extends in all directions equally. The size of the balloon represents the amount of RF energy that the transmitter is sending to the antennas, and the antenna is converting the energy to radiated RF energy.
As you move the car forward a few inches or feet, the radio reception starts to come in clearer. As you move the vehicle, you are actually moving the antenna slightly, out of the point where the multiple signals converge. In all probability, the radio signal was reflecting off another vehicle or metal object nearby. In some cases, if signals are received in equal strength, yet delayed in such a manner that they are opposite in polarity, they will actually cancel each other out completely, creating a total absence of received signal by the receiver.
Next you will learn about the regulations that surround WLANs, and then finally move on to selecting the proper WLAN architecture and components for your system. Chapter 3. 11 WLAN devices are typically certified and used in an unlicensed mode of operation, meaning they do not require an operator's license or station license to be put into use. However, unlicensed does not mean unregulated. 11 WLAN operation is subject to a variety of regulations that impact range, scalability, portability, and a host of other factors that affect the overall usability of WLANs.