Ethernet, 802.3, -. - LLC, 802.2, IEEE Ethernet , LLC . , Ethernet 4- . Ethernet IEEE 802, LLC , , LLC . , IEEE , , .
, , , Ethernet.
Ethernet ( , ):
802.3/LLC ( Novell 802.2)
Raw 802.3 ( Novell 802.3)
Ethernet DIX ( Ethernet II)
Ethernet SNAP
802.3/LLC , 802.3 802.2.
802.3 :
. - 10101010. . , (transceiver) .
10101011. .
- 2 6 (MAC- ). - , : 0, , 1, ( ) . 1. 6- .
- 2- 6- , . - 0.
.
0 1500 . 46 , - , .
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, (46 ). . , .
- 4 , , ( CRC-32). , , , , .
802.3 MA-, 802.2 LLC . LLC .
802.3/LLC 4. LLC 3 , 1497 .
. 4. Ethernet
, Raw 802.3 ( "" 802.3) Novell 802.3. , MAC- 802.3, LLC. Novell LLC NetWare - , - IPX, NetWare.
2 , Ethernet .
2
Ethernet_II | IPX, IP, AppleTalk Phase I |
Ethernet 802.3 | IPX |
Ethernet 802.2 | IPX, FTAM |
Ethernet_SNAP | IPX, IP, AppleTalk Phase II |
, Ethernet , :
2500 ,
1024 .
, , .
Ethernet, .
, , MAC- . , MAC- 10 . , (interframe gap), , .
- , . , , MAC- LLC-.
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|
, MAC- jam-, . jam- MAC- .
(attempt limit), 16. , .
, , MAC- . (truncated binary exponential backoff). .
(slot time) - , , . - (collision window). - , , . :
= +
802.3 , 10 / 0.1 .
802.3 512 , 2.5 . 512 64 , - , . .
N- L , L - , [0, 2N]. 10 (, 16), [0, 210], [0, 1024]. 802.3 1.
1.
10 /c | |
512 | |
9.6 | |
jam- | 32 |
( ) | 1518 |
( ) | 64 (512 ) |
64 |
, Ethernet , (packets-per-second, pps). Ethernet , . Ethernet , , .
64+8 = 72 576 , 57.6 . 9.6 , , 67.2 . Ethernet 14880 /.