of the public services network (which uses `realraum.at`) and of the Funkfeuer
VLAN (which has no `realraum.at` zone).
- Networks using RFC 1918 IP space use the 192.168.VID.0/24 subnet;
+ for instance, the IoT network has id 33 and uses the 192.168.33.0/24 subnet.
- The gateway for a network is on the last IP for the subnet.