Wireless Sensor Network (WSN) are becomingmore challenging day by day; some of major challenges aresecurity attacks, packet drops, high power consumptions, lowbattery backup and some connectivity problems, but the mostsignificant problem is providing quality service under harshenvironments, where sensor nodes, facing several problemssuch as batteries of sensor nodes not working properly, whentemperature goes to very low in winter, reliability of monitoringsystem, energy and power losses etc, hence performance ofnetwork degrades greatly. By applying an Efficient NetworkManagement Scheme (ENMS), we can handle these majordrawbacks thus our network working accurately even in harshenvironments.In this paper we have discussed Security, Fault andPerformance management related issues in Wireless SensorNetwork