Journal of Emerging Technologies in Web Intelligence Contents

JOURNAL OF EMERGING TECHNOLOGIES IN WEB INTELLIGENCE, VOL. 2, NO. 2, MAY 2010 99Figure 7: Impact of Blackhole Node on Throughput of ReceivedPacketsFigure 6 : Shows the Packet Loss of AODV and blackholeAODVFig. 7 shows the effect of blackhole attack onthroughput of received packets of network. The resultshows both the cases with blackhole and withoutblackhole attack. With our simulation, we analysed thatthe throughput of received packets in AODV is very highthan the throughput of received packets inblackholeAODV. Because the packet loss inblackholeAODV is higher than the AODV protocol.We studied the performance with varying number ofBlackhole Nodes. Number of Blackhole Nodes variesfrom 1 to 4 with the increment of 1. Fig. 8 shows theimpact of number of Blackhole Nodes on throughput inthe network.. Simulation results show that the throughputdecreases with the increase of number of BlackholeNodes.We also studied the performance with varying thenumber of nodes. Fig. 9 shows the impact of number ofnodes on throughput without blackhole attack. Thenumber of nodes is varying from 10 to 50 with the step of10. Simulation results show that when the number ofnodes increases, the throughput increases for AODVprotocol.We have evaluated the End-to-End Delay with varyingthe mobility speed of nodes without blackhole node andwith blackhole node. The mobility speed varies from10m/s to 50m/s with the increase of 10.Fig. 10 illustrates the End-to-End Delay withblackhole attack and without blackhole attack. Weobserved that, there is increase in the average end-to-enddelay without the effect of blackhole attack. This is dueto the immediate reply from the malicious node becauseit doesn’t check its routing table.Figure 8: Impack of Number of Blackhole Nodes on ThroughputFigure 9: Impact of Number of Nodes on Throughput© 2010 ACADEMY PUBLISHER