, Ethernet, (, ).
, , . 5-4-3 4- , . , , 4- 10Base-5 5- 500 , , 537 . , 72 , 575 , , Ethernet 38 . , 802.3 , 4 .
IEEE 802.3 , , , , , 5-4-3 4- . , , , . , 500 , 100 . .
Ethernet, , , :
- 1024;
- , ;
- (Path Delay Value, PDV) 575 ;
- IPG (Path Variability Value, PVV) , 49 . 96 , , 96 - 49 = 47 .
, , 2500 .
PDV
IEEE, , . . 11.3 , PDV Ethernet. bt.
|
|
802.3 , , , . , , , , . , , . , , .
11.3. PDV
, bt | , bt | , bt | 1 , bt | , | |
10Base-5 | 11,8 | 46,5 | 169,5 | 0,0866 | |
10Base-2 | 11,8 | 46,5 | 169,5 | 0,1026 | |
10Base-T | 15,3 | 42,0 | 165,0 | 0,113 | |
10Base-FB | 24,0 | 0,1 | |||
10Base-FL | 12,3 | 33,5 | 156,5 | 0,1 | |
FOIRL | 7,8 | 29,0 | 152,0 | 0,1 | |
AUI (> 2 ) | 0,1026 | 2+48 |
11.14. Ethernet,
, , . , . 11.14. , . 1. 2-5 6, . , .
, , (, ). , , .
, , ( ) .
, ( 1 ), , . PDV 575.
, : , . PDV. 10Base-T, , , , 1, 5.
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4- 1 6 5 , 10Base-FB. , 2800 , 2500 . PDV .
1:15,3 () + 100 0,113 - 26,6.
2: 33,5 + 1000 0,1 = 133,5.
3: 24 + 500 0,1 = 74,0.
4: 24 + 500 0,1 = 74,0.
5: 24 + 600 0,1 = 84,0.
6: 165 + 100 0,113 = 176,3.
PDV, 568,4.
PDV 575, , 2500 , 4-.
PVV
, , PVV.
PVV , IEEE . 3.6.
11.4.
, bt | , bt | |
10Base-5 10Base-2 | ||
10Base-FB | ||
10Base-FL | 10,5 | |
10Base-T | 10,5 |
PVV .
1: 10Base-T: 10,5 bt.
2: 10Base-FL: 8.
3: 10Base-FB: 2.
4: 10Base-FB: 2.
5: 10Base-FB: 2.
PVV, 24,5, 49 .
Ethernet , , .