the ARPAnet backbone is a mesh. the "last mile" ISP networks are trees. what we have now is a hybrid system. a pure mesh system in those last mile networks is n

the ARPAnet backbone is a mesh. the "last mile" ISP networks are trees. what we have now is a hybrid system. a pure mesh system in those last mile networks is not feasible at scale, unfortunately. traffic congestion, hardware interoperability, and meshnet protocol latency become overwhelming when the number of users rises.