Klaus Wehrle is leading the junior research group on Protocol-Engineering and Distributed Systems at Wilhelm-Schickard-Institute of Computer Science at University of TA1/4bingen (Germany). In July 2002 he received his PhD degree (with honors) for his dissertation on flexible and scalable quality-of-service mechanisms for the next generation Internet, which was awarded with the 2002 Doctoral Dissertation Award of SA1/4dwestmetall Association and the 2002 FZI Doctoral Dissertation Award (German Research Center for Information Technologie, FZI). In August 2002 he joined the ICIR networking group at the International Computer Science Institute (ICSI) as a postdoctoral fellow in the area of Peer-to-Peer networking and overlay networks. In September 2003 he set up an independant junior research group in the area of Protocol-Engineering and Distributed Systems at University of TA1/4bingen. His research activities arefocused on (but not limited to) engineering of networking protocols, implementation techniques for protocols, formal description techniques for protocols, quality of service, multicast, network simulation, peer-to-peer-networking as well as all operating system issues of networking.