Acknowledgments

We would like to thank several people without whom this research would have been extremely difficult. The anonymous USITS reviewers provided many valuable comments. Margo Seltzer and Dave Sullivan at Harvard University graciously allowed us to do the critical cross-country tracing at one of their machines. Brian Roberts gave us the last available 100Mb/s Ethernet switch port on our floor. Ed Swierk hosted one of our laptops in his campus apartment. T.J. Giuli lent us his laptop for several weeks.

This work was supported by a gift from NTT Mobile Communications Network, Inc. (NTT DoCoMo). In addition, Kevin Lai was supported in part by a USENIX Scholar Fellowship.