, DCF. (Carrier Sense Multiple Access with Collision Avoidance, CSMA/CA). CSMA/CD, . , . - , - , .
2.2 - DCF
DCF . 802.11 ( 2.2). - , .
, , . IEEE 802.11 ( ): . . , , RTS/CTS , ( ) . , , .. , . , , (IFS). IFS , . - , . , CSMA/CD. , [0, CW], CW Contention Window ( ).
, / , . ( 2.2). 3. ( ) 3 . , 1, , .
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, , . .
- , , . , . , . , , .
; , FHSS 28 , DSSS 1 . , , . , , . , , .
, .
, . , . [0, CW], , . , , 8 ( CW = 7), 16 (CW = 15), 32 . . CW 802.11 , .
CSMA/CD, , 802.11 . N , , . , .