A Survey on Detection and Prevention Techniques for Gray-Hole Attack in MANET

Mobile Ad Hoc Network (MANET) is a kind of wireless ad hoc network. It is a self-managed network of mobile routers connected by wireless links with no access point. Every mobile device or node in a network is independently controlled in autonomous mode. The mobile devices are free to move randomly and organize themselves arbitrarily. The wireless ad-hoc network is particularly vulnerable due to it’s open medium nature, dynamic changes in network topology, co-operative algorithms, lack of centralized monitoring point and lack of a clear line of defense. In this paper we will discuss about the gray hole attack which disrupt the various network parameters used to check the performance, it’s detection and prevention techniques. Keywords— MANET, Gray hole, Gray hole attack detection and prevention techniques, Mobile Adhoc Network, Security attacks, Routing protocols.