Abstract
A MANET is a collection of mobile nodes by wireless links forming a dynamic topology without any network infrastructure such as routers, servers, access points/cables or centralized administration. The nodes are free to move about and organize themselves into a network. These nodes change position frequently. The main classes of routing protocols are Proactive, Reactive and Hybrid. A Reactive (on-demand) routing strategy is a popular routing category for wireless ad hoc routing. It is a relatively new routing philosophy that provides a scalable solution to relatively large network topologies. The design follows the idea that each node tries to reduce routing overhead by sending routing packets whenever a communication is requested. DSR and AODV are reactive route discovery algorithms where a mobile device of MANET connects by gateway only when it is needed. The performance differentials are analyzed using varying performance metrics. These simulations are carried out using the ns-2 network simulator. Keywords - AODV, DSR, MANET, NS-2, Reactive routing protocols, Survey.
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