Token Ring (802.5)
Token Ring, Ethernet, , , . , , Ethernet, , . , (token).
5.1.1
( , Token Ring, FDDI, , 802.4, - ArcNet, )
.
5.1 -
5.1 , 6 , 1 3. 3 ( ). 1 . 3 - , .
5.1.2 Token Ring
Token Ring :
- ;
- ;
- .
, .
SD | ED | ||||||||||||||||||||||
J | J | R | R | R | J | J | I | ||||||||||||||||
5.2 -
, , (. 5.3).
SD | FC | DA | SA | INFO | FCS | ED | FS |
5.3 - 5.1.3
5.1.3 Token Ring
Token Ring IBM , MSAU (Multi-Station Access Unit), (. 5.4). Token Ring 260 .
5.4 - Token Ring
FDDI
|
|
FDDI.
5.2.1
FDDI Token Ring, .
FDDI .
- , (, ), (.5.5), . Wrap, .
5.5 - FDDI
MAC IEEE 802 . FDDI Token Ring, . 5.6 FDDI OSI. FDDI (MAC) . , FDDI LLC, IEEE 802.2.
5.6 - FDDI
5.2.2. FDDI
. .
5.2.3 FDDI
FDDI - . FDDI . - Dual Attachment, DA. Single Attachment, SA.
FDDI -. (Station), (Concentrator). : SAS (Single Attachment Station), DAS (Dual Attachment Station), SAC (Single Attachment Concentrator) DAC (Dual Attachment Concentrator). , - (. 5.7).
5.7 FDDI
FDDI (. 5.8).
5.8 - FDDI
.
5.2.3 FDDI
FDDI 4/5 NRZI. 125 .