MANETs (Mobile Ad hoc NETworks) have unique features i.e. dynamic configuration, wireless radio medium, restricted resources and lack of centralized management; as a result, they are susceptible to various kinds of attacks in many layers of protocol stack. Every node in a MANET is able of functioning as a router. The requirement for a protected MANET networks is powerfully connected to the privacy and security characteristics. This Jamming attacks are one of them. These happen by transmitting continuous radio waves to inhibit the transmission between receiver and sender.