Abstract
In recent years, networking systems have witnessed a breakthrough. Due to the advances in network and communication technology, new concepts such as the Internet of Things (IoT) have emerged in network configurations. The IoT framework connects devices such as computers, mobile phones, etc. Hence, there is a necessity to secure networks. One of the possible tools to secure such networks is the Intrusion Detection Systems (IDS). The idea of operation of these systems depends on anomaly detection tools and concepts. In this paper, we mainly concentrate on the Software-Defined Network (SDN) implementation of IoT networks. This implementation saves the large cost of many hardware components in the networks. The paper is targeted to the application of IDS in SDN-based IoT networks. Different studies are presented, explored, and compared. The main objective of this survey study is to introduce new research directions for SDN-based IoT networks. Moreover, the new concept of blockchain is exploited in this paper for security enhancement of SDN-based IoT networks.