Commercial agreements drive the routing policies used in today's Internet. The two most extensively studied commercial agreements are transit and peering; however, they are only two of many diverse and continuously evolving commercial agreements that ISPs enter into. So far, the only known...

Large-scale peer-to-peer systems span a wide range of Internet locations. Such diversity can be leveraged to build overlay “detours” to circumvent periods of poor performance on the default path. However, identifying which peers are “good” relay choices in support of such detours is...