u003cmeta charset=u0022utf-8u0022/u003eA secondary network is a protective 'subnet' that bridges the gap between WSN gateways and the open internet. Secondaries ensure data security and privacy, acting as a firewall. Connected servers (the network's 'DMZ') will approve or reject incoming requests, curate metadata, and censor anything too sensitive for public broadcast. One secondary network can handle requests to multiple WSN gateways.