CSMA/CD.
Ethernet , - (carrier-sense-multiply-access with collision detection, CSMA/ CD).
. ' , - . ' ( ) , - ' . , , (Multiply Access, MA)
CSMA/ CD , 㳿 Ethernet..
, () , . , - , . , (carrier-sense, CS). , 5-10 , , .
, , . 6 . 1 , , . Ethernet 1 , . (preamble), 7 , 10101010, 8- , 10101011. Start of Frame. .
, , , , , , , , -. - , - , .
2 1 , , , 2 , 1 .
. 6. CSMA/CD
ϳ ' (Inter Packet Gap) 9,6 . ( ), , . ϳ , . 1.
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2 1, 9,6 .
, . , , , . , (collision), , Ethernet, .
, Base(band), 㳿 Ethernet (, 10Base-2, 10Base-T ..). Baseband network , .
. 7. 糿
Ethernet. . 7 3 1. 糿 ', , . , , , . 糿 .
, . , , , 糿 (collision detection, CD). 糿 , , ( , , ) 糿 32 (jam-).
ϳ , , ' . . :
= L * ( ).
512 ( 㳿 Ethernet ; bt ; 10 /c 0,1 100 c). L , [0, 2N], N : 1, 2,.... 10.
ϳ 10- , , . , 0 52,4 .
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16 , .
, , , . 70- , 10 / ' , . ' , Ethernet. 糿 . Ethernet , . , , , Fast Ethernet.
, CSMA/CD , -, . , , , 1, . , Ethernet . Token Ring FDDI, Demand Priority 㳿 l00VG-AnyLAN .