1
Ethernet | . , | |||||||
t0 | tm | t0 | tm | t0 | tm | t1 | ||
10BASE5 | 11,8 | 55,0 | 46,5 | 89,8 | 169,5 | 212,8 | 0,0866 | |
10BASE2 | 11,8 | 30,8 | 46,5 | 65,5 | 169,5 | 188,5 | 0,1026 | |
10BASE-T | 15,3 | 26,6 | 42,0 | 53,3 | 165,0 | 176,3 | 0,1130 | |
10BASE-FL | 12,3 | 212,3 | 33,5 | 233,5 | 156,5 | 356,5 | 0,1000 | |
FOIRL | 7,8 | 107,8 | 29,0 | 129,0 | 152,0 | 252,0 | 0,1000 | |
AUI (> 2 ) | 2+48=50 | 5,1 | 5,1 | 5,1 | 0,1026 |
:
1214 .
10BASE5 à10BASE2 | 10BASE5 ß 10BASE2 |
575 , .
2
10BASE5 | ||
10BASE2 | ||
10BASE-T | 10,5 | |
10BASE-FL | 10,5 |
49 , .
4) :
1. | . | ||
2. | 4 | . | |
3. | |||
4. | 12 | ||
5. | . | ||
6. | N- | ||
7. | 15- | . | |
8. | . | ||
9. | (FOMAU) | . | |
10. | Barrel- N- | . | |
11. | N- | . | |
12. | N- | . | |
13. | BNC- | . | |
14. | BNC T- | . | |
15. | BNC | . | |
16. | BNC | . | |
17. | RJ-45 | . | |
18. |
3
FAST ETHERNET
Fast Ethernet
2 /1,2,3/
Fast Ethernet IEEE 802.3. Ethernet, CSMA/CD (Carrier-Sense Multiple Access/Collision Detection) () 100 /. Fast Ethernet Ethernet.
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|
Fast Ethernet . Fast Ethernet . , .
Fast Ethernet:
- 100BASE-T4 ( 100 M/ ); 8/6 NRZI.
- 100BASE-TX ( 100 M/ ); 4/5 MLT-3.
- 100BASE-FX ( 100 M/ - , - ). 4/5 NRZI.
100Base-TX 100Base-FX 100Base-X.
Fast Ethernet , 10 100 /. .
Fast Ethernet , - . , . 0,5 , 40- . - , , . .
() () Fast Ethernet:
- I , , . : 100BASE-TX, 100BASE-T4 100BASE-FX. , I ;
- II . (, 100BASE-TX) , (, 100BASE-TX 100BASE-FX). II , I, .
, 100BaseT, Ethernet 10/100 /. ( 100BaseT ) 10 / 100 /.
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Fast Ethernet : , , , . , - DTE (Data Terminal Equipment).
, - . , , () , , , , .
DTE, , , , .
Ethernet 802.3:
- 1024
-
- (Path Delay Value, PDV) 575
- IPG (Path Variability Value, PVV) , 49
Fast Ethernet, MAC Ethernet, - PDV 512 .
- PVV , 49 , Fast Ethernet , .
Fast Ethernet :
, - ( DTE- DTE);
, - (DTE) ;
;
, .
Fast Ethernet - (DTE) , .
!!! Ethernet, Fast Ethernet . (1024 , 2500 , 5-4-3, 5 II, ..) , .
100BASE-TX
100BASE-TX 10BASE-T.
, ( 100 ) 8- RJ-45 5. 100 . c . Fast Ethernet, 100BASE-TX, 5. .
100 Fast Ethernet ( ). 90 , 10% .
4 : .