During route discovery process in AODV protocol, the malicious flooding attacker floods the route request packets through the victim node symbolizing as setting up a path. Following the path establishment, the attacker floods data packets through the victim node for paralyzing the node. As the packet size of these data packets is much larger than the route request packet, the victim nodes get congested easily. The attackers consume the battery power of the victim node, thus separating them from the network. Hence, the malicious flooding attack leads to denial of service (DoS) attack on the victim node. Thus, there is worsening in the act of processing the valid packets at the victim node. As the malicious flooding attack congests the victim node as well as the entire network, it is very harmful to the mobile ad hoc network. Also it is very difficult to avoid this attack when it is caused by the multiple attackers. The flooding and packet dropping attacks preventing the network service availability result in ineffective secure routing. …show more content…
The general form of security violation is the DDoS attack where the attackers floods huge incoming packets over the victim nodes. Generally in wireless networks, attackers introduce the false packets effortlessly imitating another sender which is termed as spoofing attack. Whatever is the type of attack that has happened in MANET, the data communication among the nodes may not be valid. The action taken by the malicious nodes depends on the type of attack. In order to overcome all these issues, it is necessary to develop a defense mechanism against malicious flooding