IEEE 802.11 - , ( HDLC). (), . (, ). 7.1 .
7.1. 802.11
00 () | , (, PCF ..) | |
, ; BSA ; SSID | ||
: , , SSID | ||
(beacon): , SSID .; | ||
, | ||
() | ||
RTS | ||
CTS | ||
ACK | ||
CF PCF | ||
CF | ||
() | ||
( CF) | ||
( CF) | ||
( ) | ||
( CF) | ||
( CF) |
- . 7.10. , , , .
(16 ) :
IEEE 802.11 ( 0);
: (00), (01), (10);
, , = , = ʻ;
DS DS 1 , ( DS), ( DS) , ;
(More frag) 1 , MSDU, MSDU ;
(Retry) 1 , , , ; ;
(Pwr. mgt) ;
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More data 1 , , , MSDU;
WEP (Wired Equivalent Privacy) 1, (Frame body).
/ID (Duration/ID) . ( Network Allocation Vector), . , .
To DS From DS . 7.10. - 48 , . BSS ID :
- - - () BSA,
- ad-hoc - 48 , .
, 1 2 , . . 3 4 .
, AP , - - , . Address 1 Address 2 BSS, . , MAC- AP, .. P BSS, - ( ), - MAC- AP BSS, - ( ). Address 3 Address 4 - - SS.
(Sequence control) 4 MSDU, 12 (0 -4096).
(Frame body) , .
CRC 32- , .
, . , , RTS (20 ) :
- 2 ,
- 2 ,
- 1 2 - 12
- 4 .
CTS , , ( ) ; 14 .
, - - (PDU), , . , , : , MAC- (MSDU), , SA .
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802.11- c IEEE 802.3 6- LLC.