In wireless network, comparison of the routing protocols for different network topologies plays very important role for evaluation of its performance. Performance is calculated by Quality of Service (QoS) parameters. In this paper, parameters like throughput, delay and fairness are studied with the help of NS2.34 network simulator software. Comparative evaluation of ad hoc routing protocols like Ad-hoc On-demand Distance Vector (AODV), Dynamic Source Routing (DSR), DSDV and Ad-hoc On-demand Multipath Distance Vector (AOMDV) is done in different scenarios, i.e. one hop and two hops.