G. Relationship Between Sensor Networks and IoT In earlier sections we introduced both IoT and sensor network concepts. In this section we explain the relation- ship between the two concepts. Previously, we argued that sensor networks are the most essential components of the loT. Figure 4 illustrates the big picture. The IoT comprises sensors and actuators. The data is collected using sensors. Then, it is processed and decisions are made. Finally, actuators perform the decided actions. This process is further discussed in Section IV. Further, integration between wireless sensor networks and the loT are comprehensively discussed in[48] The difference between sensor networks(SN) and the IoT is largely unexplored and blurred. We can elaborate some of the characteristics of both SN and loT to identify the differences.