A sending device bound to six devices will send one message to the network reflector which will result in the network reflector sending six unicast messages. Consider a network divided into two equal geographic regions, A and B, with the network reflector on the centerline. If the sending device is deep into region A and the receiving devices are deep into region B, then for every message sent, network traffic in region A will be six times less than it would be if the sending device has generated six instead of one trans-network messages. If all devices are nearby each other, deep in one region, then network traffic in that region is very much more than if the sending device could just send single hop messages to the intended recipients.