Number of devices communicating

• Single source – single destination

  • point-to-point
  • cheap connections, no tri-stating necessary

• Single source – multiple destination

  • fanout limitations
  • addressing scheme to direct data to one destination

• Multiple source – multiple destination

  • arbitration between senders
  • tri-stating capability is necessary
  • collision detection
  • addressing scheme
  • priority scheme
  • fairness considerations

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