. 12.
. 6, 100BaseFX (412 ) 100 bt . . 5 Fast Ethernet . , 100 .
6.
Fast Ethernet
1 100 .
2 105 (5 ).
, , . (), , . , , . (), , . , , , .
FDDI
FDDI (Fiber Distributed Data Interface) . 100 /. (), , (token assing). , , . . . , . . 95 /, . 20 /.
500 1000 , 2 45-60 , 100 , 200 . FDDI Token Ring, , , . () () . FDDI Ethernet Token Ring, . , . FDDI , (backbone) . FDDI -, , .
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FDDI ANSI X3T9.5 (1987-1988 .), 1995 ANSI X3T12. ISO 9314-xx , ANSI. 1993 . FDDI-II, . FDDI-II FDDI, FDDI. FDDI-II .
FDDI 4 : PMD, PHY.MAC SMT (. 12).
PMD (Physical Medium Dependent) (, , ), .
PHY (Physical) , , . PHY PMD OSI.
MAC (Media Access Control) , , , CRC, , . - OSI, LLC-.
SMT (Station Management) , , , , , . , , . 200 /.
FDDI CDDI (Copper Distributed Data Interface) TPDDI (Twisted Pair Distributed Data Interface). SDDI STP Type 1. , 100 . , .