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Wi: Wireless Fi: Fidelity.or Wi-Fi

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DEFINITION:

Wi-Fi term is that it is wireless networking between more than 2 computers keeping internet connectivity aside. Wireless networking is different from wireless internet. “Wireless Fidelity“( Wi-Fi) refers to wireless networking technology that allows computers and other devices to communicate over a wireless signal. It describes all network components that are based on one of the 802.11 standards, including 802.11a,802.11b, 802.11g, and 802.11n. These standards were developed by the IEEE and adopted by the Wi-Fi Alliance, which trademarked the name "Wi-Fi".

Wi-Fi Technology :

Wi-Fi is commonly called as wireless LAN, it is one of those networks in which high frequency radio waves are required for transmission of data from one place to another. Wi-Fi operates on several hundreds feet between two places of data transmission. This technology only works on high frequency radio signals. Otherwise, it will not work properly.
Nowadays this technology is used as office or home network and in many electronic devices. Wireless LAN or Wi-Fi is divided into three main parts on which its whole working depends and all of its applications also depend on these parts i.e. Infrastructure mode.

Zigbee technology :

A type of low cost, low power and wireless technology which is used for the different purposes at ultra low power is known as Zig bee technology.
It offers excellent wireless control path network.
It was not designed for the excellent or high speed data transfer rate applications. But it was designed for working on excellent long battery timings at low cost and also at ultra low power consumption.
It is an ideal technology which operates at low power , low cost and used for wireless monitoring and control.

FUTURE ADVANCEMENTS

Bluetooth is a wireless technology that allows computers, phones and other devices to talk to each other over short distances (typically about 10 meters). It is found in many of the newer mobile phones, handheld computers, and laptops as well as in other sorts of products. Bluetooth uses radio waves and is designed to be an inexpensive way of connecting and exchanging information between devices without wires. 
Bluetooth can be used to exchange business cards or even used for sending voice from a headset to a mobile phone. Examples of this type of technology are the Nokia 6600  and the Sony Ericsson P900 mobile phones. These specific phones allow you to connect your PC and enable you to transfer files and perform backups.