UTP 5 (Category 1 - Category 5). 1 2 EIA/TIA-568, 568 , .
STP , , , , . , . , .
, - , . . -
- OSI
OSI (. 1.25) : , , , , , . .
(Physical layer) , , , , , . , , , . , , , , , , . , .
. , , () , . (Data Link layer) . . , (frames). , , , , . , . , . , . , . , , , , Ethernet frame relay.
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(Network layer) , , . . .
. , , . (Transport layer) - - , . OSI , . : , , , - , , .
(Session layer) : , , . , , . , , .
(Presentation layer) , . , , . , ASCII EBCDIC. , . Secure Socket Layer (SSL), TCP/IP.
(Application layer) - , , , Web-, , , . , , (message).
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. : NCP Novell NetWare, SMB Microsoft Windows NT, NFS, FTP TFTP, TCP/IP.
OSI : , , , . - , - , . , FDDI . - , - . , . , Ethernet l00VG-AnyLAN , , .
, .
- . .
(Physical layer) , , , , , . , , , . , , , , , , . , .
, , . - . 2.12. 300 3400 , , 3100 . - 100 10 , - 3100 . .
, , ( - ).
: (. 2,13, ) , - . - , - .
(. 2.13, ) 0 1 - f0 f1. , 300 1200 /.
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(. 2.13, ) 0 1 , , 0 180 0,90,180 270 .
, , .
- . .
(Physical layer) , , , , , . , , , . , , , , , , . , .
.
, , , . , - .