1. WI-FIWI-: . , ..5790, 2. 3. Wi-FiWi- Wi-Fi , Ethernet , , 2,4 5 GHz. (SSID Service Set Identifier), 0,1 Mbit/s.Wi-Fi (WLAN) IEEE 802.11. 802.11x . Wi-Fi () (Wireless access point, Access Point (APs) ) . " " (SSID ServiceSet Identifier, "Network name") . 4. Wi-Fi Wi-802.11b 11 Mbit/s, 2,4GHz. - -, .802.11g , . 2,4 GHz 54 Mbit/s. OFDM .802.11n , , (draft) . 2,4 GHz 540 Mbit/s. 5. Wi-Fi Wi- Data Rate Data Rate (Typ) (Max)( ) ( )Legacy 19972.4 GHz 0,9 Mbit/s2 Mbit/s ~20 ~100 802.11a19995 GHz 23 Mbit/s 54 Mbit/s~35 ~120 802.11b19992.4 GHz 4.3 Mbit/s11 Mbit/s~38 ~140 802.11g20032.4 GHz 19 Mbit/s 54 Mbit/s~38 ~140 802.11n20092.4 GHz / 5 GHz 130 Mbit/s300 Mbit/s ~70 ~250 802.11y20083.7 GHz 23 Mbit/s 54 Mbit/s~50 ~5000 6. Wi-Fi :Wi- 13 11 14 , 1, 6, 11 802.11b/g, . 7. LAN EIRP , 20dBm.., 2.4, GHz 802.11b 802.11g , LAN . , Wi-Fi . . Wi-Fi . ( ) Wi-Fi CERTIFIED by the Wi-FiAlliance , WPA2 , . . 2006 . WPA WPA2 , . 8. . , , . , , - , ? , . :WEP WPA WPA2 WiMAXWiMAX2802.1xVPN 9. WEP WEP 1999 WEP. WEP Wired Equivalent Privacy, (WLAN) IEEE 802.11b . WEP LAN LAN. WEP OSI , . WEP . - RC4 . , ( 40 64- ) , - .WEP - , - , . 10. WPAWPA (Wi-Fi Protected Access) - - WEP, 2003 , WEP. TKIP MIC.-TKIP - (Temporal KeyIntegrity Protocol) - .-MIC - (Message Integrity Check) - . WPA. - WPA-PSK (Pre-shared key) - . . WEP , . - WPA-802.1x - . . 2009 . WPA . 18 . 11. WPA2WPA2 WPA, Wi-Fi 802.11i AES CCMP . Robust Security Network - RSB ( ). WPA2 CCMP. AES. TRIP WAP. CCMP MIC Cipher Block Chaining Message Authentication Code (CBC-MAC) .WPA 2.0 AES , 3DES . AES - . AES FIPS 197. AES - TKIP. AES - - 3DES. 12. WiMAXWiMAX (Worldwide Interoperability for Microwave Access) , ( ). IEEE 802.16, 24 (15 ) . 70 MBit/s. WiMAX , Wi-Fi (IEEE 802.11) (hotspots) DSL " " ( ). 13. WiMAX2 04.04.2011. WiMAX2, 802.16m 300 Mbips. IEEE 1 (Gbps), WiMAX 2 . IEEE WiMAX 2. , LTE (Long Term Evolution) . 14. 802.1xIEEE 802.1x - , , 802.11, WEP, . . 802.1x PDA-, - . 802.1x 802.11 . 802.1x :-EAP (Extensible Authentication Protocol). . RADIUS- .-TLS (Transport Layer Security). , , , . 15. VPN VPN (Virtual Private Network) Intel. , -. VPN - .. "" . VPN - IPSec ( 70% ), - - PPTP L2TP. DES, Triple DES, AES MD5. VPN - Windows, Linux, Solaris, , . - VPN-.VPN , . 16. SSID , . SSID , . Mac , . , , . - . , . 17. . . WLAN . , LAN . WEP TKIP . , . , . 18. :http://bg.wikipedia.org/wiki/Wi-http://bg.wikipedia.org/wiki/Wi-Fi; http://pcworld.bg/; http://www.linux- http://www.linux-bg.org/; http://www.computers.bg; Wi-Fi-; Wi-Fi-