In my billion years in the industry, when I’ve asked for network diagrams, I’ve inevitably received a physical diagram – a diagram that shows where stuff is plugged in. This is fine and dandy and has lots of information, but that’s not really enough these days. In the times of Arthur, when every piece of network gear did a single thing, you only needed to know where things were plugged in. In the modern era, devices do more – a switch can route and house wireless, an ASA can terminate VPNs and be a switch – so you need more than just where the cables run.