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Emerging Peer-To-Peer (P2P) technologies have enabled various types of content to be efficiently distributed over the Internet. In order to achieve optimized user quality of experience, most P2P systems adopt selfish peer selection schemes in the application layer. On the network side, Traffic Engineering (TE) is deployed by ISPs in order to achieve efficient network resource utilization. These TE operations are typically performed without distinguishing between P2P flows and other types of traffic. Due to inconsistent or even conflicting objectives from the perspectives of P2P overlay and network-level TE, the interactions between the two and their impact on the relevant performance for each is yet to be investigated in detail.
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