CSMA/CD

Posted by AJ × 07:47

• Architecture that combines standards, topologies and protocols.

• Carriers Sense Multiple Access with Collision Detection is the most commonly

used medium access control technique

• Developed by Xerox as part of Ethernet

• Basis for IEEE 802.3

• Most popular ~ 70%

• With CSMA, collision occupies medium for duration of transmission

• Stations listen whilst transmitting

• If medium idle, transmit

• If busy, listen for idle, then transmit

• If collision detected, jam, then cease transmission

• After jam, wait random time then start again

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