Abstract
The Ad hoc on-demand multipath distance vector (AOMDV) routing protocol is one type of reactive routing protocol used in MANET. It is designed on top of the AODV routing protocol, so it utilizes the features of the AODV protocol. The MANET is a wireless ad hoc network without any physical infrastructure; all nodes can be moved across the network, and connections are made between them as needed simply with the help of RREQ, RREP, and RERR packets. Because the network is dynamic, nodes can quickly join and depart anytime. So far, no security threats have been caused by this feature. The blackhole attack is one type of active and dangerous attack in MANET. In this attack, the attackers use the AOMDV flaw to demonstrate their bad intent, causing data loss and decreasing network performance. Many studies have been done on various detection and prevention methods to prevent blackhole attacks. But it still goes on. To improve network performance against black hole attacks, this study offers a dynamic threshold value with multiple paths technique approach on AOMDV; it will be demonstrated in Network Simulator 2.
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