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...his leads to incapabilitysof distinguishing the difference between network congestions and link failures insMANET. Many research addressed the TCP performance problems due to route failuressin MANETs =-=[19, 20]-=-. For improving the TCP performance in MANET a new feedbacksbased scheme has been proposed, which declared the use of feedback mechanism thatsoffers noteworthy gains in throughputs, for saving the unn...

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... scenarios. The author in[5] also evaluate the performance of different TCP variants such as Tahoe, Reno, New reno and SACK under different node speeds and its effect on Throughput, End to end delay, FTP download response time and FTP upload response time. Also MANET TCP optimization has been investigated in many studies [6, 7]. Due to intolerance mechanisms of TCP in dealing with link failures, this leads to incapability of distinguishing the difference between network congestions and link failures in MANET. Many research addressed the TCP performance problems due to route failures in MANETs [8]. A study conducted in [9] regarding the Westwood, TCP Reno, and BIC-TCP demonstrated the superiority of Reno variant over the others. However it lacked in recognizing different realistic scenarios with one source of TCP traffic was simulated in this research. The research in [10] discussed the performance evaluations of Reno, Tahoe, New Reno and SACK in different MANET realistic scenarios under the conditions of fading, signal attenuation, and multipath. It was shown here that TCP Reno version overcame the other congestion control algorithms regarding throughput, congestion window, and goodpu...