I. INTRODUCTIONThe mobile ad hoc network (MANET) is a self-configuring mobile device infrastructure-free network. MANET is a collection of wireless mobile nodes that dynamically form a network temporarily without any central administration support. Mobile ad hoc network is a collection of wireless mobile nodes that establishes the network in the absence of fixed infrastructure. MANET routing protocols possess two properties such as:1. QUALITATIVE PROPERTIES.2. QUANTITATIVE PROPERTIES.1.Qualitative properties imply:• Distributed operation• Loop freedom• Demand-based routing• Security2.Quantitative properties imply:• End-to-end throughput.• Delay• Path discovery time• Byte requirements of memory• Network recovery time2. RELATED STUDY: A mobile ad-hoc network (MANET) is a temporary wireless network composed of mobile nodes, in which there is no infrastructure. Nodes in these networks use the same random access wireless channel, cooperating in a friendly manner to engage in multihop forwarding. Network nodes not only act as hosts but also as routers that route data to/from other network nodes. Features of MANET: 1. Dynamic network topology: MANET can be formed without any pre-existing infrastructure. As nodes move, the topology can change rapidly and connectivity within the network varies over time. 2. Distributed Operations: Nodes collaborate on operations to implement functions and no single node is solely responsible for the overall operation. Each node in the MANET can assist in routing packets in the network.3.It follows a dynamic topology where nodes can join and leave the network at any time and the multi-hop routing can keep changing as nodes j.. .... middle of the paper ......air of survey papers from which we identified the first reactive and proactive MANET routing protocols. Our review focuses on the protocols developed by Perkins, namely the Destination Sequenced Distance Vector (DSDV) and the Ad-hoc On-demand Distance Vector (AODV), which researchers claim is the most popular MANET routing protocol. Due to the popularity of the AODV protocol, researchers have proposed a number of variations and improvements to the core protocol to address specific issues with the protocol. We will investigate the evolution of the AODV protocol by examining works based on the Multicast Ad-hocOn-demand Distance Vector (MAODV), developed by [18], this protocol adds multicasting support to the main AODV protocol. Numerous researchers have highlighted the lack of security mechanisms within the original AODV protocol as a major concern for MANET implementation.