Figure 10
From: Using RELOAD and CoAP for wide area sensor and actuator networking

Total traffic, 10,000 proxy nodes. The figure shows the total amount of application protocol traffic exchanged in the system during the measurement period when using 10,000 Proxy Nodes (PNs), 1-100 Local Nodes (LNs) per PN, and a 10 min CoAP notification interval. A subset of the PNs was assumed to be located behind P2P-unfriendly NATs.