Each card is a device; the numbered sockets are its network ports, coloured by speed (blue = 1 Gigabit) with a purple T on trunk/uplink ports. Solid lines are wired; dashed lines are Wi-Fi. This is how Horotics knows that if a switch goes down, everything under it is affected — so it shows the real cause, not twenty separate alarms. Use the chips above to overlay a group (Cameras, AV, Climate, Wi-Fi) onto the backbone.