Abstract: A mobile ad hoc network (MANET) is a wireless network that uses multi-hop peer to peer routing. A user can move anytime in an ad hoc scenario and, as a result, such a network needs to have routing protocols which can adopt dynamically changing topology. To accomplish this, a number of ad hoc routing protocols have been proposed and implemented such as, Ad hoc On-Demand Distance Vector routing (AODV), Fisheye State Routing (FSR) and Location-Aided Routing (LAR). This paper compares the major characteristics of these protocols such as, routing messages overhead, throughput and end to end delay using a parallel discrete event-driven simulator, GloMoSim. The experimental results show that FSR protocol has low control overhead compared with AODV and LAR. Regarding the throughput, AODV has a high throughput compared with the other considered protocols. Considering the end to end delay, LAR protocol shows better performance over FSR and AODV protocols.