Abstract: A Mobile Ad-hoc Network (MANET) is a dynamic wireless network that can be formed without the need for any pre-existing infrastructure in which each node can act as a router. Mobile ad hoc network (MANET) is an autonomous system of mobile nodes connected by wireless links. Wireless Networks enable users to communicate and transfer data with each other without any wired medium between them. The main classes of routing protocols are Proactive, Reactive and Hybrid. In this work an attempt has been made to compare the performance of prominent on demand reactive routing protocols for MANETs:- Ad hoc On Demand Distance Vector (AODV), OLSR (Optimized Link State Routing) and Dynamic Manet on demand (DYMO). AODV is a reactive protocol: the routes are created only when they are needed. The simulation is carried out using the ns-2 network simulator. The Blackhole attack has been implemented on the routing protocol. The Research proposal considered five different simulation environments with different number of nodes which are 5, 10, 15, 20 and 25 and results are compared in a graphical representation. There are number of parameters considered for compare the performance among these protocols. The parameters are Throughput (Good put), packet delivery ratio and Routing Overload. The results presented in this work illustrate the importance in carefully evaluating and implementing routing protocols in an ad hoc environment.
Keywords: AODV (Ad hoc On-Demand Distance Vector); OLSR (Optimized Link State Routing); Dynamic Manet on demand (DYMO), MANET (Mobile Ad Hoc Networks), PDR (Packet Delivery Ratio), Throughput.