IEEE 802.3 CSMA/CD
If the medium is idle, transmit (1-persistent).
If the medium is busy, wait until idle and then transmit immediately.
If a collision is detected while transmitting,
- Transmit a jam signal for one slot (= 51.2 ?s = 64 byte times)
- Wait for a random time and reattempt (up to 16 times)
- Random time = Uniform[0,2min(k,10)-1] slots ? truncated binary exponential backoff