Abstract: Wireless mobile ad hoc networks (MANETs) are self configuring, dynamic networks in which nodes are free to move. A major performance constraint comes from path loss and multipath fading Many MANET routing protocols exploit multi paths to route packets. The probability of successful packet transmission on a path is dependent on the reliability of the wireless channel on each hop. Rapid node movements also affect link stability, introducing a large Doppler spread, resulting in rapid channel variations. However, due to their inherent characteristics of dynamic topology and lack of centralized management security, MANET is vulnerable to various kinds of attacks. Black hole attack is one of many possible attacks in MANET. Black hole attack can occur when the malicious node on the path directly attacks the data traffic and intentionally drops, delay or alter the data traffic passing through it. This attack can be easily lessen by setting the promiscuous mode of each node and to see if the next node on the path forward the data traffic as expected. The implementation of AODV, OLSR and DYMO routing protocol and their comparison based on the performance metrics will be detailed in the Research Paper. The Proposal has been explained in this paper.
Keywords: AODV (Ad hoc On-Demand Distance Vector); OLSR (Optimized Link State Routing); Dynamic Manet on demand (DYMO), MANET (Mobile Ad Hoc Networks).