Grzegorz Iwacz works in the Internet industry. His major interest is the development of web applications. He received his MS degree from AGH University of Science and Technology, Krakow, Poland (Major: Telecommunications Networks and Services) in 2006 . He also received a Bachelor's degree from Jagiellonian University, Krakow, Poland (major: Human-computer Interaction) in 2008. He was a student at Helsinki University of Technology, Espoo, Finland in 2005 and was in touch with practical aspects of multicast, especially IPDC technology implementations, while visiting Finland in 2005 and 2006. He has a high level of interest in efficient multimedia delivery in mobile networks and has followed the IPDC technology since its early stages. Andrzej Jajszczyk is a professor at AGH University of Science and Technology in Krakow, Poland.He received his MS, PhD, and Dr Hab. degrees from Poznan University of Technology in 1974, 1979and 1986, respectively. He spent several years at universities in Australia and Canada. he is the author or co-author of six books and over 230 papers, as well as 19 patents in the areas of telecommunications switching, high-speed networking and network management. He has been a consultant to industry, telecommunications operators and government agencies. He was the Editor-in-chief of IEEE Communications Magazine and also serves on the editorial boards of various reputed journals, including Annales des Telecommunications, china Communications and Computer Communications. Over many years he has been active in the IEEE Communications Society, where he is currently its Vice-President. He is a member of the Association of Polish Electrical Engineers and a Fellow of the IEEE. Michal Zajaczkowski is an OSS Solution Manager in the Telecommunications Business Unit at Comarch SA. He received his MS degree from AGH University of Science and technology Krakow, Poland (Major: Telecommunications Networks and Services) in 2006.  In 2005, while studying at Helsinki University of Technology, he had his first contact with the practical aspects of multicast. This was then followed by a thorough study on the subject of multicast. This was then followed by a thorough study on the subject of multicast-based technologies, such as IPDC and MBMS, from their very early standardization stages. The study was accompanied by subsequent visits to Finland, scheduled to meet with mobile operators as well as with research and standardization bodies.