* When there is more than two persons/devices sharing the network/area.
* When there is more than two persons/devices sharing the network/area.
* When the information must be privately exchange between 2 persons/devices
* When the information must be privately exchange between 2 persons/devices
−
* When communication confirmation is suited between persons/devices.
+
* When acknowledgment are suited in the communication.<small><br />Indeed, we have to know the number of each other (NODE_ID) to callback for acknowledgement).</small>