International Journal of Engineering and Technical Research (IJETR) ISSN: 2321-0869, Volume-2, Issue-10, October 2014 153 www.erpublication.org Abstract — A mobile Ad Hoc Network (MANET) is a collection of wireless mobile nodes forming temporary network without using any existing infrastructures and it frequently changes network topology for efficient dynamic routing protocols. This paper presents the performance comparison of AODV with and without malicious node in the MANET with respect to the packet lost, packet received, packet delay, packet throughput. The entire activities were simulated on NS-2.35 (Network Simulator Version 2.35) which works on MAC 802.11 model and wireless transmission channel model. The overall 25 mobile nodes are used to get the simulated results and helps to determine the performance with and without malicious node. Index Terms— MANET, Routing Protocols, Packet Lost, Packet Received, Packet Delay, Packet Throughput I. INTRODUCTION MANET often interacts among them using multiple hops wireless links. They do not have any fixed framework networks and base-station. Classrooms, meetings, conferences, battle-fields, disaster relief activities are a few situations where MANET can be used effectively. In this paper, we emphasized on the evaluation of AODV protocols with and without the use of malicious nodes .The routing protocol able to keep up with the high degree of node mobility that often changes the network topology drastically and unpredictably. Routing protocol for MANET can be categorized into three which are as follows: 1. Proactive Routing Protocols 2. Reactive Routing Protocols 3. Hybrid Routing Protocols Proactive Routing Protocols:-Every nodes in the network has one or more routes to any possible destination in its routing table at any given time. Reactive Routing Protocols:-Every node in the network obtains a route to a destination on a demand fashion. Reactive protocol does not maintain up-to date routes to any destination in the network and do not generally exchange any periodic control messages. Hybrid Routing Protocols:-Every nodes acts re-actively in the regions close to its proximity and proactively outside of that region or zone. Manuscript received October 17, 2014. Devottam Kumar, CSE Department, M.Tech Scholar, CSVTU, Bhilai/ RCET College. Ruhy Khanam, CSE Department, Assistant Professor, CSVTU, Bhilai / RCET College. Ad Hoc On-Demand Distance Vector Routing (AODV): It uses a traditional routing table i.e. one entry per destination. From the names it reveals that it is an on demand protocol and reactive in nature for finding routes only when sender wants to send data. AODV spread sequence number to control packets flooding in the network. When the source wants to communicate with destination node whose route is unknown for sender, its broadcasts a RREQ (Route Request) packets to all it neighbors node. Each RREQ packet contains request-id, source and destination node IP addresses and sequence number along with the hop count and flags fields in its packet format. When the RREQ packet arrived at the destination node a RREP (Route Reply) the packet is generated and sends back to the source. RREP packet contains the destination node, IP - addresses, sequence number, route life time of a hop count and flags. Intermediate nodes that receive the RREP packet, increment the hop count field and it establishes a forward route to the source of the packet and transmit the packet on the reverse route. When a link failure is detected for a network, RERR (Route Error) message is sent to its active neighbors that were using a route to send packets. Destination Sequenced Distance Vector (DSDV):- DSDV is a proactive and table driven routing protocol for MANET. In DSDV network, every node maintains its own routing table and share by the neighbor node. The routing table contains nodes IP address, sequence number and hop count to reach the next node along with the address of neighbor destination node and the time-stamp of the last update received for that node. Each node of ad hoc networks updates the three fields in the routing table i.e. destination address, sequence number and hop count. These updating is made by periodic and trigger updates. DSDV routing a table is updated periodically when new information is available which help in maintaining consistency of the dynamically changing of the routing table. The other updating a trigger where source need to communicate with the destination. Then a trigger is applied where fixed route neighbor nodes are updated the route table to send the packet of the destination. Dynamic Source Routing (DSR):- DSR use the concept of a source routing, where each packet carries the list of the nodes through which the packet is routed. The purpose of using DSR is that intermediate nodes do not need to maintain to update routing information in order to forward the packets through the fixed route. DSR protocol consists of two mechanisms that are Route Discovery and Route Maintenance. Route Discovery:-Source node wants to communicate with Destination node by sending packets. For sending packets route are discovered in DSR network. The source node will flood the route request packet in the network. The intermediate node in the network is responses from the route reply packet to the source node that the intermediate node Performance Evaluation of MANET Using AODV Routing Algorithm Devottam Kumar, Ruhy Khanam