| What are Wi-Fi
and WiMAX? WiFi stands for "wireless fidelity." In 1997, the IEEE (Institute of Electrical and Electronics Engineers) introduced a set of standards for wireless local-area networks designated "802.11." 802.11 networking uses Ethernet protocol, is only effective over distances of a few hundred feet, and the spectrum is unlicensed. That means there can be interference on the network. Security has been a weak point as well, as others can "listen in" to unprotected wireless signals. However, Wi-Fi has one major selling point that has pushed its adoption regardless of its shortcomings: low cost. A Wi-Fi access point can be purchased for less than $50, according to presenters at a recent wireless conference in Monterey, Calif., and so Wi-Fi access "hot spots" are being set up in homes, coffee shops and other businesses. The technology has advanced quickly, with newer versions of 802.11 (designated 11a, 11b etc.) rolling out. One of the more promising of these protocols is 802.16, also called WiMAX. A WiMAX signal, emanating from a tower, can reach a radius of three to five miles, making it a possible solution for "last mile" Internet connectivity coverage for cities and counties.
Demystifying WiMAX |