Recently, there are so many mobile with WiFi feature. Through WiFi, mobile user can do free internet access. WiFi is an abbreviation of Wireless Fidelity, which is a technology used for local Wireless Local Area Network (WLAN) based on IEEE 802.11 specification which recently had four variances, they are 802.11a, 802.11b, 802.11g, and 802.11n. In the beginning, WiFi used in wireless device and dan Local Area Network (LAN), but recently much more used to access Internet.
By WLAN, someone with Wireless Card or PDA can connect to the Net using the closest hotspot access. WiFi is also one communication and information technology worked in WLAN (Wireless Local Area Network) device and network. One of the factor pushed public interest in using WiFi is easy access. In an area, someone can access internet at the same time without bothering by cable.
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