I mean. A zigbee lightbulb is hosting a service that is communicating with a server. How "large" does a service running on a device ned to be to be considered? Take tasmota running on some sonoff devices. Is that supposed to be in the list?

Another example. I am running OpenWrt. Should i them add a router to the list? What if I have a router from my internet provider that I manage some DNS or port forwarding in? Should that be included?

What is a physical device? I am a bit unsure in relation to this question.

I mean. A server is a physical device. A router is a physical device A switch is a physical device Even my zigbee lightbulbs is a physical device

Where should i draw the line?