The migration to wireless network from wired network has been a global trend in the past few decades. The mobility and scalability brought by wireless network made it possible in many applications. Among all the contemporary wireless networks, Mobile Ad hoc NETwork (MOBILE ADHOC NETWORK) is one of the most important and unique applications. On the contrary to traditional network architecture, MOBILE AD-HOC NETWORK does not require a fixed network infrastructure; every single node works as both a transmitter and a receiver. Nodes communicate directly with each other when they are both within the same communication range. It is crucial to develop efficient intrusion-detection mechanisms to protect MOBILE AD-HOC NETWORK from attacks. With the improvements of the technology and cut in hardware costs, we are witnessing a current trend of expanding MOBILE AD-HOC NETWORKs into industrial application