Effects of malicious attacks in mobile ad-hoc networks

The mobile ad-hoc networks (MANET) are an emerging research area with applications. It has features like working as a router, dynamic topology and autonomous. In MANET, nodes have limited resources like battery power, storage space and bandwidth. There is a need to do more research for Denial of Service (DoS) attacks in MANET as compared to wire line DoS attacks. MANET is vulnerable to different types of DoS attack in which packets are drop. Black hole attack, packet drop attack and gray hole attack are an event that eliminates a network´s capacity to perform its expected function. These attacks are type of DoS attack which we examine in this paper. This paper shows the effects of black hole attack, packet drop attack and gray hole attack on AODV protocol under different performance metrics throughput, packet drop rate and end-to-end delay. The simulation is done in Network Simulator (NS) 2.