Comparison and Analysis between Reactive Routing Protocols in MANET using Opnet17.5v Mandeep Kaur Department of Electronics and Communication Engineering BBSBEC, Fatehgarh sahib, Punjab, India Navdeep Kaur Department of Electronics and Communication Engineering BBSBEC, Fatehgarh sahib, Punjab, India Mandeep Kaur Department of Electronics and Communication Engineering BBSBEC, Fatehgarh sahib, Punjab, India Raju Sharma Asst. Professor, Department of Electronics and Communication Engineering BBSBEC, Fatehgarh sahib, Punjab, India Abstract- In the modern era, use of mobile wireless devices is increasing enormously which leads probers to frequently work over the new improvements in mobile ad hoc network i.e. MANET and routing protocols in MANET. The main aim behind this project is to compare the existing Reactive MANET routing protocols by using Opnet17.5 software. The focus of this paper is on reactive routing protocols (AODV and DSR) under the scenarios using file transfer protocol (ftp).In MANET, it is not an easy task to predict the performance of routing protocol. During this research, we analyzed the performance of reactive MANET routing protocols ,for example: Ad-hoc on demand distance vector routing (AODV) and Dynamic source routing (DSR) on the basis of different parameters such as delay, throughput, number of hops per route, routing traffic send and received. Keywords – MANET, AODV, Delay, DSR, No. of hops per rote, route traffic received, route traffic send. I. INTRODUCTION TO MANET MANET stands for Mobile Ad hoc Network .The concept of MANET is nothing but the group of wireless mobile nodes without using any cables, infrastructures, architecture. Every mobile node in this network acts as peer or routing which does both the tasks- packets sending (forwarding) and packets receiving. MANET does not require centralized administration or fixed network infrastructure such as base stations or access points. Network topology may vary rapidly and unpredictably over time, because the nodes are mobile. A MANET consists of mobile nodes, a router with multiple hosts and wireless communication devices. II. CLASSIFICATION OF MANET ROUTING PROTOCOLS Routing protocols in MANETs are basically categorized, based on their routing approaches, into proactive, reactive and hybrid protocols. 1. Proactive Routing Protocols- This type of protocols maintains fresh lists of destinations and their routes by periodically distributing routing tables throughout the network. The main drawbacks of such algorithms include respective amount of data for maintenance, and slow reaction on reconstructing and failures. For Example: Destination-Sequenced Distance Vector (DSDV) Routing Protocol 2. Reactive Routing Protocols- This type of protocol finds a route on demand by flooding the network with route request packets. The main drawbacks of such algorithms are high latency time in route finding and network clogging due to excessive flooding. For Example: Dynamic Source Routing (DSR) protocol and Ad hoc On Demand Distance Vector (AODV) routing protocol. International Journal of Innovations in Engineering and Technology (IJIET) Volume 6 Issue 1 October 2015 240 ISSN: 2319 – 1058