Fast Ethernet, , , , , , .
100BASE-TX
Fast Ethernet IEEE 802.3u Ethernet 1995 . . Ethernet Fast Ethernet , ( ). Fast Ethernet .
, Fast Ethernet , , . Fast Ethernet , , - Fast Ethernet , .
Ethernet Fast Ethernet, Fast Ethernet . .
100BASE-TX .
100BASE-TX 10BASE -T (. 12.1). , (UTP) 5 , . Fast Ethernet.
, 10BASE -T 8- RJ-45. 100 (, , 90 , 10- ). . Fast Ethernet, 100BASE-TX. 10BASE -T 5.
. 12.1. 100BASE-TX
RJ-45 4 (. 12.1): (TX+ TX-) (RX+ RX-). . 4/5, , FDDI, . IEEE 802.3.
( 150 ). 9- DB-9, STP IBM 1 (. 12.2), , Token-Ring. . 12.2.
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12.1. RJ-45 | ||
TX+ | / | |
TX- | / | |
RX+ | / | |
RX- | / | |
. 12.2. DB-9
12.2. DB9 | ||
RX+ | ||
TX+ | ||
RX | ||
TX |
10BASE -T, 100BASE-TX : (. 12.3). (crossover) . (direct) . , "X". , 10BASE -T.
100BASE-TX (FLP Fast Link Pulse). 10BASE -T (Auto-Negotiation). " ".
. 12.3. , 100BASE-TX
100BASE-T4
100BASE-T4 100BASE-TX , , (UTP). , 100BASE-TX ( 3, 4 5). 100BASE-T4 100 / , , , - 5.
100BASE-TX (. 12.1). . 100 ( 90 10- ).
100BASE-TX, () 8- RJ-45. 8 . 12.3.
12.3. RJ-45 100BASE-T4 | ||
TX_D1+ | / | |
TX_D1 | / | |
RX_D2+ | / | |
BI_D3+ | / | |
BI_D3 | / | |
RX_D2 | / | |
BI_D4+ | / | |
BI_D4 | / |
TX , RX ,
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BI
, .
. , , . 12.4. , "". , 100BASE-TX 10BASE -T.
. 12.4. 100BASE-T4
100 / ( 3) 100BASE-T4 , 8/6. , 8 , , 6 ( -3,5 , +3,5 0 ) , . 36 = 729, , 28 = 256, - . 25 /, 12,5 (. 12.5). , , MLT -3.
. 12.5. 8/6 100BASE-T4
(BI_D3 BI_D4) (TX_D1 RX_D2). , (TX_D1 RX_D2) (. 12.6).
. 12.6.
100BASE-T4 FLP . "Link". FLP (. " ")
100BASE-FX
100BASE-FX , .
100BASE-FX 10BASE-FL. (. 12.7).
. 12.7. 100BASE-FX
. 10BASE-FL, () SC, ST FDDI. SC FDDI , ST .
412 , , . , 1,35 . ( ) 11 . , 12 , 0,5 2 ( , ).
Fast Ethernet, 100BASE-FX , . "Link".
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4/5 ( 100BASE-TX), ( 100BASE-X). NRZI.
(Auto-Negotiation)
( ), Ethernet, . . , Ethernet 10 /, Fast Ethernet 100 /.
( Auto-Negotiation) , , , , , , . , : .
, , : 10BASE -T, 100BASE-TX 100BASE-T4. , . , . , .
, Fast Ethernet, FLP (Fast Link Pulse) NLP (Normal Link Pulse), 10BASE -T. , NLP, FLP ( ) , . FLP .
10BASE -T , FLP, NLP. , . , , , , .
10BASE -T, 100BASE-TX 100BASE-T4 (full duplex) Ethernet (10BASE -T Full Duplex) Fast Ethernet (100BASE-TX Full Duplex).
.
, :
- ( ),
- ( , ),
- ( ).
Ethernet : . , (CSMA /CD).
Ethernet . , , . :
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- ,
- , .
, Ethernet Fast Ethernet , , . , .
(. 12.4), , , . .
12.4. | |
100BASE-TX Full Duplex | |
100BASE-T4 | |
100BASE-TX | |
10BASE -T Full Duplex | |
10BASE -T |
1 , 5
, , , , , 10BASE -T 100BASE-TX, 100BASE-TX, ( ).
, , . , 10BASE -T, , FLP, NLP. 10BASE -T. , 100BASE-TX, , 100BASE-TX. (Parallel Detection).
, , . , , , : 10BASE -T (10BASE -T 100BASE-TX), 10BASE -T, . () . , (10BASE -T) . ( ) , 10 / , 100 / .
. , , , . , , , . " " (Next Page function).
() FLP -, 16- . 17 33 , NLP, 10BASE -T. 2 16,8 (.12.8).
. 12.8. 10BASE-T
FLP . . , , . , . . 12.9. , FLP 17 33.
16- , LCW (Link Code Word), , . 12.10.
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. 12.9. ,
. 12.10. LCW,
(Selector Field) 32 . : 00001 IEEE 802.3, 00010 IEEE 802.9.
(Technology Ability Field) , . IEEE 802.3 , 12.4.
RF (Remote Fault) . Ack (Acknowledge) . , NP (Next Page) , , .
. 1 2, .
1. 1 (LCW) ( ) Ack.
2. 2 (LCW).
3. 1 2 ( Ack ), ( ) Ack ( LCW 2).
4. 2 LCW Ack.
5. 1 2 Ack, , 2 LCW.
6. 1 LCW Ack 68 , .
7. , .
, . , , . , , , , ..
NP (. . 12.10). LCW, , 16- , . 11 , . , , .
, , , . , , , (10BASE2 10BASE5) . (Fast Ethernet, Gigabit Ethernet) .