Abstract: Deterministic network interface for an avionic network, configured for two Ethernet physical media, with two neighboring network interfaces. The network interface of the invention allows the realization of ring-topology network without collision in the physical Ethernet media. The communication between nodes is carried out in a fully deterministic fashion by an unconnected (UDP) protocol. The interface of the invention incorporates a hardware end-to-end integrity mechanism that ensures message integrity from the memory of the sender host to that of the recipient one.