Sunday, 7 December 2014

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802.11 WLAN

Wlan
A wireless local area network ( WLAN ) is a wireless computer network that links two or more devices using a wireless distribution method  within a limited area such as a home, school, computer laboratory, or office building.

Use 802.11 also called wifi


Wi-Fi
  • Wi-Fi is a WLAN (Wireless Local Area
  • Network) technology.
  • The older variant of Wi-Fi, 802.11g speeds of up to
  • 54Mbps
 802.11b (providing up to 11Mbps).

802.11n
The more recent standard is called 802.11n (offering speeds of up to150Mbps per channel or up to 600Mbps in total). It can be used in the 2.4 GHz or 5 GHz frequency bands, 

Wi-Fi 802.11ac

latest (so far) Wi-Fi ac standard. It allows for speeds of up to 500 Mbps per channel and over 1Gbps in total.  Wi-Fi 802.11ac operates only on the 5GHz band.
Wi-Fi is much faster than any data cellular network like GPRS, EDGE and even UMTS and HSDPA.
The range 
 is from 30 to 100 meters indoors
while outdoors  can cover about 650 meters.

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