Thursday, March 5, 2015

Basic info about WI-FI networks

SOME BASIC INFO ABOUT WI-FI........
1. wifi is basically known as wireless fidelity. wi-fi networks have range that's limited by the transmission power,antenna type,the location they r used in and the environment.
2.A wireless network enables people to communicate and access applications and information without wires. This provides freedom of movement and the ability to extend applications to different parts of a building, city, or nearly anywhere in the world. Wireless networks allow people to interact with e-mail or browse the Internet from a location that they prefer.
3.FOUNDER OF WI-FI :Terence Percival ,john Deane,Diethelm Ostry,
and Graham Daniels 
4.TYPES OF WIRELESS NETWORKS.
WLANS: Wireless Local Area Networks
WLANS allow users in a local area, such as a university campus or library, to form a network or gain access to the internet. A temporary network can be formed by a small number of users without the need of an access point; given that they do not need access to network resources.
WPANS: Wireless Personal Area Networks
The two current technologies for wireless personal area networks are Infra Red (IR) and Bluetooth (IEEE 802.15). These will allow the connectivity of personal devices within an area of about 30 feet. However, IR requires a direct line of site and the range is less.
WMANS: Wireless Metropolitan Area Networks
This technology allows the connection of multiple networks in a metropolitan area such as different buildings in a city, which can be an alternative or backup to laying copper or fiber cabling.
WWANS: Wireless Wide Area Networks
These types of networks can be maintained over large areas, such as cities or countries, via multiple satellite systems or antenna sites looked after by an ISP. These types of systems are referred to as 2G (2nd Generation) systems.

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