Anycast-Aware Transport for Content Delivery Networks

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Executive Summary

Anycast-based Content Delivery Networks (CDNs) have many properties that make them ideal for the large scale distribution of content on the Internet. However, because routing changes can result in a change of the endpoint that terminates the TCP session, TCP session disruption remains a concern for anycast CDNs, especially for large file downloads. In this paper the authors demonstrate that this problem does not require any complex solutions. In particular, they present the design of a simple, yet efficient, mechanism to handle session disruptions due to endpoint changes.

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