IEEE 802.3
IEEE (Institute of Electrical and Electronics Engineers) 802.3 is a LAN (Local Area Network) protocol that specifies an implementation of the physical layer and the MAC (Medium Access Control) sublayer of the data link layer. IEEE 802.3 uses CSMA/CD (Carrier Sense Multiple Access with Collision Detection) access at a variety of speeds over a variety of physical media. Variations of IEEE 802.3 include 10Base2, 10Base5 and 10BaseT.