Joseph D. Touch, Ph.D. is a project leader and research assistant professor at the University of Southern California's Information Sciences Institute in Marina del Rey, California, USA. He is chair of the IEEE Communications Society Technical Committee on Gigabit Networking.James P.G. Sterbenz, D.Sc. is a senior network scientist and manager of Mobile, Wireless, and Active Networking in Internetwork Research at BBN Technologies, GTE in Cambridge, Massachusetts, USA. He is past chair of the IEEE Communications Society Technical Committee on Gigabit Networking.