WWIVnet was a bulletin board system (BBS) network for WWIV-based BBSes.
[1] The system was similar to FidoNet in purpose, but used a very different routing mechanism that was more automated and distributed.
The AC reported to the Group Coordinator (GC), which was responsible for updating the node lists for the area codes under them.
The GC reported to the Network Coordinator (NC), who was responsible for sending out node list updates.
Simply put the only way to control the flow of data was to reduce the number of nodes on the network the system connected to.