Abstract: The IoT will connect many of the domestic devices in the world, from smart thermostats to smart vehicles. By the end of 2015, we already had 9 billion connected things. According to the Gartner prediction the number of devices in the network will surpass 50 billion by 2020. The majority of the connected devices in the current network are based on obsolete security infrastructure and encryption, while many of them do not have provisions to update these devices remotely. Considering the number of the IoT devices, from off-the-shelf motion monitoring to bespoke instrumentation, itís impossible to control which functions are back-ending any specific service or product. This is the problem in a nutshell: One canít trust the integrity of the end deviceís security and determine exactly where the data is being processed and stored. The architecture of SDN is designed to escalate progress in routing and networking performance for the current networks by isolating the control plane from the data plane. This basic concept of Software Defined Networkingcan be applied to IoT Multinetworks; however, the common SDN implementations designed for wired networks are not directly amenable to the distributed, ad hoc, low-power, mesh networks commonly found in IoT systems. SDN assuresadvancements in overall lifespan and performance of IoT networks.However, the SDN architecture changes the IoT network's communication patterns, which leads to a new approach to manifest the security IoT network. The centralized control of data layer and control layer will not only make the management of data packets easier but will also increase the security. As mentioned above, the quantity of data flowing in these systems is considerably huge. Proper traffic management and load balancing will help to take some extra effects towards the cause of making data flow easier. Power consumption of the total system can be reduced due to the central station, which requires lesser power than distributed control. In summation, the introduction of SDN in IoT will make IoT more useful and instigate IoT into the regular lives of people.
Keywords: Software-Defined Networking (SDN), controller, OpenFlow, OpenDayLight.