In wireless communication, using ad-hoc networking any user desiring to communicate with each other can form a temporary network, without any form of centralized administration. Each node participating in the network is mobile and can be connected dynamically in an arbitrary manner. All nodes of these networks behave as routers and take part in discovery and maintenance of routes to other nodes in the network. Because nodes are forwarding packets for each other, some sort of routing protocol is necessary to make the routing decisions. Routing in the MANETs is a challenging task and has received a tremendous amount of attention from researches. This has led to development of many different routing protocols for MANETs, and each author of each proposed protocol argues that the strategy proposed provides an improvement over a number of different strategies considered in the literature for a given network scenario. In the recent years, it has been quite difficult to determine which protocols may perform best under different network scenarios, such as change in node density and traffic applications. This paper begins with an overview of classification of routing protocols. We then provide a performance comparison of throughput for three mobile ad-hoc routing protocols AODV, DSR and OLSR to understand and analyze the behavior of these protocols under different parameters. All the experimental set up and simulations is done using OPNET v14. 5 Simulator.

1. Gurleen Kaur Walia et al, "Node Density based Performance Analysis of Two Reactive Routing Protocols in Mobile Ad-hoc Networks", (IJCSIT) International Journal of Computer Science and Information Technologies, Vol. 2 (3), 1229-1234, ISSN: 0975-9646, 2011.
2. Ashish Shrestha, Firat Tekiner, "Investigation of MANET Routing Protocols for Mobility and Scalability" , School of Computing, Engineering and Physical Sciences, University of Central Lancashire, Preston, UK, ISBN: 978-1-902560-22-9, PGNet, 2009.
3. Routing protocols and concepts Version 4. 0, CCNA exploration companion guide. ''Introduction to dynamic routing protocols''. Chapter three pages 148 to 177, ISBN 978-81-317-5627-0, Dorling Kindersley (India), Cisco Press, 2011.
4. Pallavi Khatri, Monika Rajput, Alankar Shastri and Keshav Solanki, "Performance Study of Ad-Hoc Reactive Routing Protocols" Journal of Computer Science 6 (10): 1159-1163, 2010, ISSN 1549-3636, Science Publications, 2010.
5. Paris Wells, "A comparison between the DSR and AODV Routing Protocols", Brunel University School of Engineering & Design, Wireless Data Communications Systems, 2007.
6. A. K. Gupta, H. Sadawarti and A. K. Verma, "Performance Analysis of AODV, DSR & TORA Routing Protocols," IACSIT International Journal of Engineering and Technology, Vol. 2, No. 2, April 2010.
7. C. Mbarushimana, A. Shahrabi, "Comparative Study of Reactive and Proactive Routing Protocols Performance in Mobile Ad Hoc Networks", 21st International Conference on Advanced Information Networking and Applications Workshops (AINAW'07), IEEE Computer Society, March 2007.
8. NS-2 Newtork simulator. http://www. isi. edu/nsnam/ns/.
9. L. Bajaj, M. Takai, R. Ahuja, R. Bagrodia, and M. Gerla, "GloMoSim: A scalable network simulation environment", Technical Report 990027, UCLA Computer Science Department.
10. QualNet Simulator, Version 3. 6. Scalable Network Technologies, Inc. , Culver City, CA, USA, http://www. scalable-networks. com, 2003.
11. OPNET Simulator. OPNET Technologies Inc. , Bethesda, MD, USA. http://www. opnet. com/.
12. Drytkiewicz, W. , S. Sroka, V. Handziski, A. Koepke and H. Karl, "A mobility framework for OMNET++", 3rd International OMNeT++ Workshop, Budapest University of Technology and Economics, Department of Telecommunications Budapest, Hungary, 2003.
13. OPNET Modeler 14. 5 Documentation.
14. Thomas Kunz, "Implementation vs. simulation: Evaluating a MANET multicast protocol", in Proceedings of the Global Mobile Congress 2004, Shanghai, China, pages 129-134, Delson Group (2004), October 2004.
15. Mostafa Fazeli, and Hasan Vaziri "Assessment of Throughput Performance under OPNET Modeler Simulation Tools in Mobile Ad Hoc Networks (MANETs)", 2011 Third International Conference on Computational Intelligence, Communication Systems and Networks, 2011.
16. Nadia Qasim, Fatin Said, Hamid Aghvami, "Mobile Ad Hoc Networks Simulations Using Routing Protocols for Performance Comparisons", Proceedings of the World Congress on Engineering 2008 Vol I WCE 2008, London, U. K. , July 2 - 4, 2008.
17. A. Singh and S. Mishra, "Performance Analysis of Reactive Routing Protocols in Mobile Ad-hoc Networks," IJCSNS International Journal of Computer Science and Network Security, Vol. 10 No. 8, August 2010.
18. Aboelela Emad, "Network Simulation Experiments Manual" – 2nd Edition, Chapter 15 – Mobile Wireless Networks, ISBN: 978-0-12-373974-2, Morgan Kaufmann Publishers, Elsevier Inc. , 2008.
19. http://www. ietf. org/rfc/rfc2501. txt.
20. Lawrence M. Leemis, Stephen K. Park, "Discrete Event Simulation- A First Course", ISBN 978-81-7758-591-9, Dorling Kindersley (India), Pearson Education, 2009.
21. Forouzan, Behrouz, "Data Communications and Networking – 4th ed. ", ISBN 978-0-07-063414-5, Tata McGraw-Hill Publishing Company Ltd. , 2009.

Routing Protocol Manet Aodv Dsr Olsr Opnet Ftp Traffic Multimedia Video Conferencing Traffic