> An air gap may not be viable, but you can place a firewall there. No idea how it was one or two decades ago, but modern architectures certainly have one. I

> An air gap may not be viable, but you can place a firewall there. No idea how it was one or two decades ago, but modern architectures certainly have one. I can't remember the specifics, but the one I looked at was actually pretty beefy hardware-wise, it had three reasonably powerful cores, 1GB RAM, etc. > There is no reason for everything to be on the same bus. It isn't. They would run into bandwidth or (more likely) latency issues anyway.