Wireless Networking is a tools in which numeral mobile nodes can converse with each other openly or not directly through wireless relations. A sensor network is poised of a great number of sensor nodes and a sink. In the wireless sensor networks the main difficulty is incomplete battery life used by sensor nodes because the size of sensor nodes is little so constraint are there like battery size, processor, storage for data, these all are small as sensor nodes Routing protocols of sensor networks are faithful for handles the routes in the networks. This paper collects current routing protocols for sensor networks and current a classification for the various approaches pursued and dissimilarity their power and control.