The Impact of Packet Drop Attack and Solution on Overall Performance of AODV in Mobile Ad–hoc Networks
Ashok M. Kanthe1, Dina Simunic2, Ramjee Prasad3
1Ashok M. Kanthe,  Sinhagad Institute of Technology, Lonavala, Maharashtra Wireless Communication at University of  Zagreb.
2Prof. Dr. Dina Simunic, is a full professor at University of Zagreb.
3Prof. Dr. Ramjee Prasad,  Professor Chair of Wireless Information Multimedia Communication at Aalborg University (AAU), Denmark.
Manuscript received on November 26, 2012. | Revised Manuscript received on December 10, 2012. | Manuscript published on December 30, 2012. | PP: 245-251 | Volume-2, Issue-2, December 2012.  | Retrieval Number: B0920112212 /2012©BEIESP

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Abstract: Mobile ad-hoc network has features like self organization, adaptation in changing environment, nodes in ad hoc network works as router for routing packets. Each nodes have limited resources like bandwidth, battery power and storage capacity. MANETs are vulnerable to Denial of Service (DoS) attacks like black hole attack, gray hole attack and packet drop attack. Packet drop attack is a kind of denial of service (DoS) attack in mobile ad hoc networks. Due to the bandwidth and memory buffer limitation, queue manager of some nodes by default may drop some packets. So differentiating between normal node to attacker node is critical one. In this paper, it is proposed the reputation and trust based mechanism against packet drop attack and improves the network performance interms of throughput, packet drop rate, packet delivery ratio, normalized routing overhead and end-to-end delay. 
Keywords: AODV, mobile ad-hoc networks, protocol, Packet drop attack, Security.