Wi-Fi is an abbreviation of Wireless Fidelity, which has a set of standards that is used for Local Wireless Network (Wireless Local Area Networks - WLAN), which is based on the IEEE 802.11 specification. Standard specifications of 802.11a or b, g, such as 802.16, is currently in preparation, specifications latest offer much improvement from a wide range of more up to speed his transfer.
Wi-Fi originally intended for the use of wireless devices and Local Area Network (LAN), but at this time more used to access the internet. This makes someone with a computer with a wireless card (wireless card) or personal digital assistant (PDA) to connect to the Internet using the access point (or with a known hotspot) nearby.
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