A wireless sensor network is a heterogeneous network consisting of a large number of tiny low-cost nodes and one or more base stations. Each sensor node comprises sensing, processing, transmission, mobilize, position finding system and power units. These networks can use in various applications like military, health and commercial. Routing in wireless sensor networks has been an active area of research for many years. Sensor nodes have a limited transmission range, processing, storage capabilities and energy resources are also limited. In wireless sensor networks data is forwarded using multi-hop mechanism.