Thursday, October 16, 2014

Write a Short Note on Wi-Fi

Write a Short Note on Wi-Fi
·        Wi-Fi, or Wireless Fidelity, is a term that is used generically to refer to any product or service using any type of 802.11 technologies.
·        Wi-Fi networks operate in the unlicensed 2.4 and 5 GHz radio bands, with an 11 Mbps (802.11b) or 54 Mbps (802.11a) data rate, respectively.
·        Wi-Fi enabled devices (laptops or PDAs) can send and receive data wirelessly from any location equipped with Wi-Fi access.
·        Access points, installed within a Wi-Fi location, transmit an RF signal to Wi-Fi enabled devices that are within range of the access point, which is about 300 feet.
·        The speed of the transmission is governed by the speed of the pipeline fed into the access point. T-Mobile HotSpot service is unique in that every T-Mobile HotSpot service location is equipped with a full T-1 connection running to the access points.
·        With T-Mobile HotSpot service, a customer, once associated with the access point, can connect to the Internet and enjoy near T-1 speeds in the comfort of Airlines, Clubs, coffeehouses,  Books & Music stores and numerous airports.
·        Wi-Fi (short for "wireless fidelity") is the popular term for a high-frequency wireless local area network (WLAN). The Wi-Fi technology is rapidly gaining acceptance in many companies as an alternative to a wired LAN.
·        It can also be installed for a home network. Wi-Fi is specified in the 802.11b specification from the Institute of Electrical and Electronics Engineers (IEEE) and is part of a series of wireless specifications together with 802.11, 802.11a, and 802.11g. All four standards use the Ethernet protocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing.
·        The 802.11b (Wi-Fi) technology operates in the 2.4 GHz range offering data speeds up to 11 megabits per second.

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