English to French Tech/Engineering Computers: Systems, Networks

Method for delivering data packets from a source node to a plurality of end-system nodes in a multicast overlay network tree with scalable group communication throughput and end-to-end reliability, the method comprising:
providing at least one backup buffer in each one of a group of end-system nodes in the multicast network tree...

J'ai trouvé "réseau de multidiffusion à superposition" comme traduction à "overlay multicast network", mais que faire de "multicast overlay network tree" et de "multicast overlay tree" ?
Peut-on parler "d'arbre du réseau" et "d'arbre de multidiffusion..." ?
Merci