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Ad-hoc networks are basically self organizing, self configuring and peer to peer multi-hop mobile wireless networks in which the information packets are transmitted in a 'Store and forward' manner from a source to an arbitrary destination via intermediate nodes. The main objective of this paper is to evaluate the performance of various ad-hoc networks routing protocols viz. DSDV (Destination Sequence Distance Vector), DSR (Dynamic Source Routing) and AODV (Ad-hoc On Demand Distance Vector). The comparison of these protocols is based on different performance metrics, which are throughput, packet delivery ratio, routing overheads, packet drop. The simulation is performed through the simulation tool NS-2 (Network Simulator- 2) due to its open source simplicity and free availability.
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