Date Added: Nov 2012
A Mobile Ad-hoc network is a heterogeneous network. They have very particular features such as high mobility, multi-hop routing, open system and the absence of any fix infrastructure. An ad-hoc network faces different type of security attack. In this paper, the authors discuss their implementation of the AODV protocol extension namely Malicious Node Attack Preventer (MNAP). AODV extension mechanism improves the AODV behavior. MNAP used the reserved field of RREQ and RREP packet format. MNAP implements security in AODV against black-hole and gray-hole attacks. Analyzes has been done based on PDR, throughput and delay of the node selected by doing simulation on Qual net network simulator.