Oh yeah[1], it's a simple concept... a single directional optical link. Laser --> Photodiode. You set up 2 servers on either side of it, and you mirror the da

Oh yeah[1], it's a simple concept... a single directional optical link. Laser --> Photodiode. You set up 2 servers on either side of it, and you mirror the data across the link, repeating the state of the buffer with forward error correction. A typical use would be to allow remote monitoring an industrial control system, collecting logs, etc. The data diode assures data can egress, but control can never ingress. [1] https://en.wikipedia.org/wiki/Unidirectional_network https://en.wikipedia.org/wiki/Unidirectional_network