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TCP has traditionally been considered unfriendly for realtime applications. Nonetheless, popular applications such as Skype use TCP since UDP packets cannot pass through many NATs and firewalls. Motivated by this observation, we study the delay performance of TCP for real-time media flows. We develop an analytical performance model for the delay of TCP. We use extensive experiments to validate the model and to evaluate the impact of various TCP mechanisms on its delay performance. Based on ourdoi:10.1145/1375457.1375464 dblp:conf/sigmetrics/BroshBRS08 fatcat:ujke6lg4hzeabdpye4rfysrjzy