# Terminology - Network Addressing

- Unicast: communication from one sender to one receiver (point-to-point). Most Internet traffic is unicast.

- Broadcast: communication from one sender to every receiver on the network. The information is usually transmitted only once. Usually used for special cases such as management and control.

- Multicast: communication from one sender to more than one receiver. The information is usually transmitted only once. In IP Multicast a receiver must enter and leave an information stream.

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