Author(s): A. Nancy
MANET is a communication network with infrastructure less environment. It consists of large number of mobile nodes or devices that can change location and configure it dynamically. The devices are also moves independently in arbitrary location. The data transaction in MANET is called routing. Routing is a main feature of Manet and it has many issues for ensure the QoS (Quality of Service). There are many routing protocols are available for routing process based on energy, traffic, shortest path, multicasting, cost, routing overhead, and security, etc. A single protocol cannot solve all the issues at a time. So there is a need for continuous implementation of routing protocols.