RadioEthernet IEEE 802.11 - , .. . 802.11 - (Wireless Local Area Networks), WLAN. Institute of Electrical and Electronics Engineers (IEEE), 802.11 802.3 Ethernet .
RadioEthernet IEEE 802.11 (MAC-) (PHY) . MAC (Medium Access Control) .
Ethernet, IEEE 802.11 , carrier sense multiple access collision avoidance (CSMA/CA). , ready to send (RTS), . , . RTS clear to send (CTS). , . (ACK) . ACK , .
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802.11 . (). , (Access Point, AP). (Basic Service Set, BSS). (Distribution System, DS), . , , (Extended Service Set). , , .
IEEE 802.11:
1. 802.11 - . 1 2 () /.
2. 802.11a - WLAN. 54 / 5 .
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3. 802.11b - . 11 / 2,4 .
4. 802.11c - , . .
5. 802.11d - ( ) .
6. 802.11e - . - , - . , IEEE WLAN.
7. 802.11f - , , . - Inter Access Point Protocol. , .
8. 802.11g - 2,4 . , 54 / 2,4 .
9. 802.11h 802.11 , 5 . 802.11h "" . , 5 .
10. 802.11i (WPA2) . - , AES (Advanced Encryption Standard) - , 128, 192 256 . - , Intel Centrino - 802.11i-. 802.1X, TKIP AES.
11. 802.11j - 802.11 4,9 .
12. 802.11n - , , 100 /.
13. 802.11r - .
IEEE 802.11, , (IEEE), : 802.11b, 802.11g 802.11a.
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802.11b | 802.11g | 802.11a | |
3 | 3 | 8 | |
2.4 | 2.4 | 5 | |
. | 11 / | 54 / | 54 / |
30 11 / 100 1 / | 15 54 / 50 11 / | 12 54 / 100 6 / |
802.11b. 802.11b 1999 . 2,4 . ( 11 /, 1 6 /) . 802.11b, 11 /, , , 802.11b .
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2004 15 . 802.11b.
2001- - 802.11a, 5 ( ISM). IEEE 802.11a 54 /, . . 802.11b, , IEEE 802.11b.
802.11 5 , ( 2,4 300 , 5 100 ). , 802.11 , 802.11b 802.11a .
802.11g , WLAN, 2,4 . IEEE 802.11g 54 /. 802.11g 802.11b 802.11b. 802.11g 802.11b, 802.11g. 802.11g . 802.11g , . , .
IEEE 802.11 ISO/OSI: . , Wi-Fi , Ethernet: TCP/IP , . IEEE 802.11b IEEE 802.11 .
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