Abstract: Mobile Adhoc Network is a type of pre-existing network framework having collection of mobile nodes, each acting as host as well as router, equipped with wireless communication and networking capability to communicate with one another. MANET goal is to provide communication to the area where limited communication organization exists. For communication between various nodes routing protocols forms important component. DSR computes the routes when necessary and then maintains the same during the entire communication network. But it also suffers from various types of attacks such as Black Hole attack and Gray Hole attack. So this paper is effort to evaluate the performance of DSR and enhances its performance in MANET network by calculating matrices such as voice end-to-end delay, network load, throughput, number of hops per route, retransmission attempts, packet delivery ratio, using OPNET Modeler 14.5.

Keywords: MANET, DSR, Black Hole Attack.