AZURE

Solid = physical (region / zone)
Blue dashed = VNet
Yellow dashed = subnet
Region · eastus
VNet A   10.1.0.0/16
subnet · all zones   10.1.1.0/24
zone 1
vm-110.1.1.4
zone 2
vm-210.1.1.5
zone 3
vm-310.1.1.6
subnet · all zones   10.1.2.0/24
zone 1
db10.1.2.4
zone 2
zone 3
VNet B   10.2.0.0/16
subnet · all zones   10.2.1.0/24
zone 1
zone 2
api10.2.1.4
zone 3