+−⟲ Azure Public RegionalLoad Balancer HTTPS / 443 HTTPS / 443 nginx app1 app2 app3 web1 web2 web3 nginx app1 app2 app3 web1 web2 web3 Layer 4 LB HTTPS / 443 Public IP 10.2.0.10 10.2.0.1 10.2.0.2 prod-vnet zone redundant flexible-server