Networking

TCP Revisited: A Fresh Look at TCP in the Wild

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Executive Summary

Since the last in-depth studies of measured TCP traffic some 6- 8 years ago, the Internet has experienced significant changes, including the rapid deployment of backbone links with 1-2 orders of magnitude more capacity, the emergence of bandwidth-intensive streaming applications, and the massive penetration of new TCP variants. These and other changes beg the question whether the characteristics of measured TCP traffic in today's Internet reflect these changes or have largely remained the same. To answer this question, the authors collected and analyzed packet traces from a number of Internet backbone and access links, focused on the "Heavy-hitter" flows responsible for the majority of traffic.

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