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 DOI: 10.17587/it.24.546-553 A. G. Abramov, e-mail: abramov@runnet.ru, St.-Petersburg  branch of FPAI SIIT&T "Informika" (Deputy director), Peter the  Great St.-Petersburg Polytechnic University (Assistant professor) This review paper is  dedicated to the world's largest telecommunication consortium GEANT (Gigabit  European Academic Network Technology), which is the pan-European high-speed  data transfer network operated and developed in the needs of the research and  education sphere. General information about current status of National Research  and Education Networks (NRENs) developing around the world and Federal  university computer network of Russia RUNNet (Russian UNiversity Network) is  given. The main principles of functioning, the features of the terabit-ready  backbone infrastructure, global, regional and intercontinental network  connectivity of the GEANT are considered. The innovative GEANT network  technology which is built on two layers (transmission and packet) is presented  and discussed in brief. Some quantitative and qualitative characteristics of  the network, GEANT topology and connectivity maps are given. The main tasks are  being performed by consortium in order to support and manage global research  projects in priority scientific areas and regional telecommunications  initiatives (such as RedCLARA, AfricaConnect, Asi@Connect, EaPConnect, CAREN)  are mentioned and discussed. The information about the network and  collaboration services developed by consortium in cooperation with local NRENs  is provided. Among these services are connectivity and network management  services, trust, identity and security services, the wide range of cloud  services, real-time communications services, etc. The current state and  potentially directions in-demand of the cooperation between the RUNNet network  and the consortium GEANT are considered. P. 546–553  | 
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