CSMA/CD Protocol

CSMA/CD Protocol

• Carrier Sense before transmission
• Carrier Sense while transmission
• Collision: Two or more stations transmitting simultaneously
• Backoff: Random delay after collision
• Deference: Defers transmission if channel is sensed busy
• Collision Window (Slot time): Round-trip propagation delay time plus some carrier sense time. In IEEE 802.3, this value is defined to be 51.2 us.

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