Remote Sensor Systems are these days turning into a normal segment in our everyday life for simplicity of numerous tasks. It is already seen that they are currently conveyed in almost every field of wireless sensor network research. Numerous territories in research and innovation are adjusting to utilize remote sensor systems for investigation of information. Contiki is another working framework when contrasted with a large portion of the other working frameworks in this field. Because of the utilization of C language for its improvement, many progressed and light segments are currently winding up some portion of it. Despite the fact that the speed of improvement in Contiki is fast and exceptional, however regardless it does not have the utilization of security natives for secure correspondence between sensor hubs. Right, now there is just a single Security engineering ContikiSec proposed for this working framework. Cooja is a test system given by Contiki, which not like most test systems additionally, enables genuine equipment stages to be imitated. In this instructional exercise you will figure out how to utilize the Cooja Simulator to arrange an essential RPL network.