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The performances of TCP Vegas versus different TCP variants in homogeneous and heterogeneous networks were evaluated via simulation experiment using network simulator (ns-2). In the simulation experiments, the authors investigate the performance of TCP Vegas in both homogeneous and heterogeneous wired and wired-cum-wireless networks. In homogeneous wired network, TCP Vegas outperforms other TCP variants. In contrast, the performance of TCP Vegas is the worst compared to other TCP variants in homogeneous wired-cum-wireless network. For both heterogeneous wired network and heterogeneous wired-cum-wireless network, TCP Vegas is unable to achieve fair bandwidth allocation when sharing the bottleneck link with other TCP variants. On the other hand, TCP Vegas has a significantly lower delay than other TCP variants in both homogeneous and heterogeneous wired and wireless networks.
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