A Network which has wireless sensor nodes animatedly form a communication-less network or provisional network without using existing network infrastructure, which is defined as wireless network [1]. The sensing of information in decisive conditions during the emergency state where the sensor network is deployed is its main importance. The benefit of developing sensor network is increasing for practical information in physical environment in different applications either manually or randomly [2]. In this paper, the authors have implemented and evaluated the performance of LEACH protocol with different network parameters on different topologies based on varying the pause time and keeping the speed constant (node speed), which is small (1000 m. x 1000 m.), large (2000 m. x 1000 m.) and very large (2000 m. x 2000 m.) Important parameters are Packet Delivery Fraction, Average, End to End Delay, Average Throughput, and NRL and Packet loss. Wireless Sensor Network (WSN) consist of independent sensors, communicating with each other to monitor the environment. Sensor nodes are usually attached to microcontroller and are powered by battery. The resource constrained nature of WSN implies various challenges in its design and operations, which degrades its performance. However, the major fact that sensor nodes run out of energy quickly, has been an issue. Many routing, power management, and data dissemination protocols have been specifically designed for WSNs, while energy consumption is an essential design issue, which preserves longevity of the network. Out of these, clustering algorithms have gained more importance, in increasing the life time of the WSN, because of their approach in cluster head selection and data aggregation. This paper elaborately compares essential routing protocols using MATLAB and NS2 tools for several chosen scenarios. The paper concludes by mentioning valuable observations made from the analysis of results about several imperative protocols.