- , . , ( ) .
- LAN-.
- ( ), , .
- MAC-.
:
,
:
( , (64 ))
CRC
( , )
:MAC-, , .
10-30 %. , .
, CRC .
, .
, .
. MAC-, , . .
1. | , MAC- . |
2. | , MAC- MAC-, . |
3. | , MAC- , , . (filtering). , . |
4. | , MAC- , , . |
5. | MAC- , , , . (flooding). . |
6. | ( ), MAC- . MAC- , , , . , ( ) , , MAC- , , , . , . |
|
|
, , . .
, : , . , , .
Ethernet , Ethernet , , . ,
Ethernet 2,5 . , , 9,6 . .
Token Ring 4 / 72- ( ) 270- ( IBM 1).
, . , .
, , . , , - . - , , , , .
|
|
. , , , StarLAN 1 / 802.3 , 10Base5 10 /. , .
IEEE 802 , , , Token Ring, Ethernet
Ethernet , , , () , .
, . , , , . , , , , .
, , . , . , , , -, , -, .
, . , . , , . , (.
3.2).
Ethernet Token Ring
, Ethernet Token Ring.
, Ethernet , WordPerfect Lotus 1-2-3, VAX, DEC.
Token Ring. ? .
, (connectivity)
(interoperability). , .
, , . , Ethernet Token Ring 16 /, , . 802.3 802.5,
MAC . Token Ring Ethernet , Ethernet.
"" "" , . Token Ring-Ethernet , Ethernet - .
|
|
, , Ethernet- Token Ring.
Token Ring "" .
Ethernet, , Ethernet- . , Token Ring
Ethernet-, , (LLC). Ethernet- Ethernet.
, Ethernet Token Ring, . , Token Ring.
, , Token-Ring - Ethernet CrossComm. , NetWare, TCP/IP LLC- 802.3. , , Ethernet , StarLAN , - Ethernet - Token
Ring. - Ethernet-, , , - .
CrossComm, " "
(dynamic conversion mode technology).
8209 IBM Ethernet Token Ring. Ethernet Token Ring
( 1500 5000 ), 8209, - , "" -, - 1500 . , .
Token Ring 8209 , Ethernet- - Ethernet-.
, , 8209 , ^ .
8209 : Token Ring - Ethernet 2; Token Ring -
802.3; 1 2.
, , :
(. transparent bridges) OSI;
(. translating bridges) ;
(. encapsulating bridges) .
. , , . . , .
|
|
, (LAN) (WAN) . WAN- , LAN- WAN-. LAN WAN LAN-, , WAN.
WAN, . LAN-, 3 /, LAN, , 64 /. , . , .
(The Institute of Electrical and Electronic Engineers IEEE) OSI : (Media Access Control MAC) (Logical Link Control LLC). MAC , , LLC , , MAC-. MAC-, (, IEEE 802.3 IEEE 802.3), (, IEEE 802.3 IEEE 802.5).