1980 IEEE 802 , IEEE 802.x, .
IEEE 802.x OSI . , . , , , . , . (Data Link Layer) :
(Logical Link Control, LLC);
(Media Access Control, MAC).
MAC - . , . , LLC, , , . MAC, .
LLC , . LLC . LLC , ,
.
MAC LLC MAC LLC, .
IEEE 802 :
802.1 . ,
, / VLAN.
802.2 LLC. 802.3,802.4, 802.5 , , , Ethernet, ArcNet, Token Ring.
, , IEEE 802 .