Nowadays, modern education and research activities are strongly dependent on a high speed communication infrastructure and computer networks based on the newest technology. Design, implementation, management of such networks together with development of new application fields are not possible without good knowledge of networking state of the art. The 12th edition of Agency ARNIEC/RoEduNets (Romanian Education Network) annual Conference, organized in Constanta by Agency ARNIEC/RoEduNet under the patronage of Ministry of National Education, offers special opportunities for information exchange in computer networking: technical and strategic aspects, communication issues, and of course their applications in education and research.