FDDI. 10 / . .
FDDI (Fiber Distributed Data Interface) - , .
. 100 /. 200 , - 2 . 500. 1300 .
. . 200 /. - (. 4.5).
. 4.5. FDDI
FDDI . NRZ ( ), 1, 0. , .
4b/5b. 4b/5b , 4 5 , , 4 , FDDI.
, , .
FDDI , . , , , . , , . , , -, , .
FDDI . , Ethernet Token Ring , FDDI.
Fiber Distribution Data Interface FDDI 80- . 10 / , . , FDDI . - .
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Ethernet FDDI , . 100 , . FDDI Token Ring! Token Ring , . FDDI - . , . , .
, , 20000 , 4500 , Ethernet. , , Ethernet, 1516 .
FDDI - . . . . , , . , . FDDI , 99% . FDDI.
FDDI
FDDI - 100 /.
FDDI X3T9.5 (ANSI). FDDI . ANSI X3T9.5 X3T12.
.
FDDI Ethernet . Ethernet 35% (3.5 /) (10 /), . FDDI 90-95% (90-95 /). , FDDI 25 .
FDDI ( ) , (, ).
FDDI Token Ring ( IEEE 802.5). - . - , . , , .
FDDI Token Ring, . , . Token Ring , . FDDI " " - 4/5, . 100 125 /, 200 /, .
(Medium Access Control - VAC). Token Ring , FDDI . .
FDDI - . (primary ring), . (secondary ring), .
, FDDI, .
(Dual Attached Station - );
2. B (Single Attached Station - ) , .
, FDDI, 4 : , , S . , . - , . (Master) S (Slave) . Single Attached Station S .
X3T9.5 . - - 100 . 500 . - - 2 , - ( 60 ).
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, Ethernet IEEE 802.x, FDDI ANSI, Token Ring IEEE 802.6 . , Fibre Channel - , .
N_ Fibre Channel (log-in) , , . Fibre Channel , , .
-
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, N_ . 0, - 1.
, , . RAID .
126 , , FC-AL.
, "-". FC-1 , , , FC-AL SSA. , SSA , SSA (hop count). CRC, . FC-AL , .
ARB N_, , NL_.
, . , NL_ , - ...
FDDI Token Ring, . FDDI :
100 /.
- , , , ..
, .
FDDI , . - FDDI, , , . (Primary) , Thru - "" "". (Secondary) .
- , (, ), (. 31), . Wrap, "" "" . / FDDI. , - . - , .
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FDDI , , . FDDI . .
. 31. FDDI
FDDI , . Token Ring ( ) - token ring (. 32, ).
, - (. 32, ). , , , - Token Holding Time (THT). THT . , . FDDI (upstream neighbor) (downstream neighbor), .
. , (. 32, ). , , , , .
, , ( , ), , FDDI (, IP), (. 32, ). : , .
, . , , , , , , , (. 32, ). , . FDDI, .
. 32. FDDI
33 FDDI OSI. FDDI (MAC) . , FDDI 802.2 (LLC), IEEE 802.2 ISO 8802.2. FDDI LLC, - .
. 33. FDDI
: PHY (Physical), PMD (Physical Media Dependent). SMT (Station Management).
PMD . :
62.5/125 .
(optical bypass switches) .
MIC (Media Interface Connector), .
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1300 , .
NRZI.
TP-PMD MLT-3. PMD TP-PMD , Fast Ethernet.
PHY , MAC- PMD, . :
4B/5B;
;
125 ;
.
MAC , . :
.
.
.
.
32- .
SMT FDDI. FDDI. SMT . SMT :
.
.
.
.
FDDI SMT : PHY , , - , MAC - , , .
FDDI Ethernet Token Ring.
FDDI | Ethernet | Token Ring | |
100 / | 10 / | 16 /c | |
/ | / | ||
CSMA/CD | |||
, | , , , | , | |
( ) | 200 (100 ) | 2500 | 1000 |
2 (-11 dB ) | 2500 | 100 | |
500 (1000 ) | 260 , 72 | ||