Foundation of Computer Science
A Mobile Ad hoc NETwork (MANET) is an incessantly self-configuring, infrastructure-less network of mobile devices allied without wires. Ad hoc is Latin word and means "For this purpose". Wireless Sensor Networks (WSNs) have all the indispensable features of ad hoc networks but to unusual degrees e.g. much inferior mobility and much extra inflexible energy necessities. In this paper, the authors scrutinize the contemporary status of research and weigh up open problems or challenges in maturity of routing techniques in WSN's.