Abstract
This paper discusses an improved mechanism to mitigate the DDoS attack in Mobile Ad-hoc Network (MANET) without compromising the packet delivery ratio. MANET inherently has geographically sparse mobile nodes more vulnerable to various attackers more radically the DDoS type. Moreover it emanates open medium, absence of centralized authority, lack of clear line of defense that leads to more vulnerability towards secure environment. Since there are no hindrances for non-legitimate nodes, which allows them to freely enter and exit from the network at anytime, various active attacks like black hole, gray hole, DDoS found to jeopardize the network. The DDoS attack discussed predominantly in to present paper, penetrates the network thereby constraining the resources like memory, battery and bandwidth by frequently transmitting fake packets after regular time span thereby starving the computing resources. This paper demonstrates the feasibility of defense mechanism to the DDOS attack in MANET.
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