wireless ..


(pocket computer) .. 2004 "" .
(wireless local area network/WLAN) (radio frequency/RF) .
(hot spots) .
2005. .

:
(wireless computer card) ( ) . (access point) .
.
( ) .
..
(WLAN) ɡ 20 ҡ UMTS (universal mobile telecommunications system) WLAN ɺ UMTS .
. 300 50 . ɡ .
..
(Institute of Electrical and Electronics Engineers/IEEE) ɡ 1997 802.11 2 ɡ 1999 b802.11 11 a802.11 54 .
b802.11 . a802.11 b802.11 . 2003 g802.11 b802.11 54 ɡ .
(wireless ethernet compatibility alliance/WECA) . Wi-Fi (wireless fidelity) .
.
ɡ ǡ . . .