This coherently structured and authorative text is the final report of the European Action COST 242, devoted to advancing research in the field of multiservice network design and performance evaluation. The excellent results presented are largely based on some 240 action reports compiled in cooperation between researchers from academia and professionals from industry and discussed during the COST 242 meetings. The 18 chapters of the book are divided into parts on traffic control in broadband networks, broadband network design, and traffic models and queueing analysis; also included is a bibliography listing 412 entries. This work essentially advances the state of the art in the area and is relevant to the international networking community at large.