Computer Networks Question:

Beaconing is a process which allows the network to render their network problems by them-selfToken ring and FDDI(Fibre Distributed Data Interface) networks make use of this process.

It is also a signalling error condition in wireless/LAN networks,during a failure the packets are transmitted as beacons,this beacon identifies the neighboring transmission which is active and helps in generation of an auto reconfiguration,hence the node which come under failure domain, automatically initiate a diagnostic measure and try to bypass the failure.