We are delighted to present the proceedings of the 7th IFIP/IEEE International Conference on Management of Multimedia Networks & Services (MMNS). The MMNS 2004 conference was held in San Diego, California, USA on October 4-6,2004.Asinpreviousyears, theconferencebroughttogether aninternational audience of researchers and scientists from industry and academia who are - searching and developing state-of-the-art management systems, while creating a public venue for results dissemination and intellectual collaboration. This year marked a challenging chapter in the advancement of management s- tems for the wider management researchcommunity, with the growing compl- ities ofthe Internet, the proliferationof alternativewireless networksandmobile services, intelligent and high-speed networks, scalable multimedia services, and the convergence of computing and communications for data and voice delivery. Contributions from the research community met this challenge with 84 paper submissions; 26 selected high-quality papers were subsequently selected to form the MMNS 2004 technical program. The diverse topics in this year's program included novel protocols in wireless systems, multimedia over wireless, mobility management, multimedia service control, proactive techniques for QoS mana- ment, MPLStra?cengineeringandresiliency, distributedsystems management, scalable multimedia systems, and adaptive methods for streaming multimedia.