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Medium Access Control: ALOHA, CSMA and CSMA/CD

When many stations share one broadcast channel (a coaxial cable, a hub, a radio frequency), two frames sent at overlapping times destroy each other: a collision. The medium access control (MAC) sublayer of the data link layer decides who may transmit when.

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Ethernet, Switches and Bridges

Ethernet is the dominant wired local area network technology. Its original form was a shared bus (later a hub) on which all stations contended with CSMA/CD (Medium Access Control).

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