Study of various Attacks and Impact of Gray hole attack over Ad-Hoc on demand (AODV) Routing Protocol in MANETS

Mobile Ad-hoc Network are dynamic networks, these networks Security of the Mobile Ad-hoc network is of great concern as the demand for reliability is getting important. Like other networks MANETS are prone to various attacks. One of routing misbehavior attack Gray hole attack targets the routing protocol of the network. Depending upon the nature of attack . This attack changes the performance of the network. Ad-hoc On-Demand Distance Vector (AODV) is prone to gray hole attack due to lack of central control and security. In this paper we are simulated the AODV protocol in different scenarios, the impact of gray hole attack in observed.