Abstract: Mobile ad-hoc network networks are self-organizing network having a concise radio range and limited bandwidth without having the any specified infrastructure. The topology of the ad hoc network may change suddenly. At this type of situation, is finding the shortest path (SP) between source and destination nodes within a specified time so as to satisfy the Quality of Service (QoS) with security. For finding the shortest path between the sources to destination, we will use the genetic algorithm (GA) with backups of routes and authentication with having, minimum power consumption and congestion. This type of routing technique will reduce the reroute discovery if failure occurred in the path. It will take the less time in resending the packet to the destination and the throughput will be high in the Mobile Ad-Hoc Network (MANET). In this paper, we will also discuss the routing protocols, its classifications, advantage and disadvantages of the routing protocols in Mobile Ad-hoc network (MANET).