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CSMA/CD Logic

Network Fundamentals / Ch. 3 - Fundamentals of LANs

Detailed CSMA/CD logic
Step 1. A device with a frame to send listens until the Ethernet is not busy.
Step 2. When the Ethernet is not busy, the sender(s) begin(s) sending the frame.
Step 3. The sender(s) listen(s) to make sure that no collision occurred.
Step 4. If a collision occurs, the devices that had been sending a frame each send a jamming signal to ensure that all stations recognize the collision.
Step 5. After the jamming is complete, each sender randomizes a timer and waits that long before trying to resend the collided frame.
Step 6. When each random timer expires, the process starts over with Step 1.
Created by: k3ntucky
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