It is a
wireless technology that uses radio frequency to transmit data through the air.
Wi-Fi is based on the 802.11 standard:
802.11b -Appear
in late 1999, 11 Mbps (theoretical speed), 4-6 Mbps (actual speed), 100 -150
feet range
802.11a -Introduced
in 2001, 54 Mbps (theoretical speed), 15-20 Mbps (Actual speed), 50-75 feet
range
802.11g-Introduced
in 2003, Combine the feature of both standards (a, b), 100-150 feet range, 54
Mbps Speed