The Cloud Region also contains three availability domains (AD), labeled AD1, AD2, and AD2. The VCN is divided into two subnets, one public (labeled Public Subnet (10.0.1.0/24)) and one private (labeled Private Subnet (10.0.2.0/24).

• Public Subnet (10.0.1.0/24) contains in AD1 an active load balancer and, in AD2 a standby load balancer. These load balancers are connected to indicate failover architecture.
• Private Subnet (10.0.2.0/24) contains a web server in each AD, labeled VM1, VM2, and VM3. These VMs are connected unidirectionally to the active load balancer in the AD1 public subnet.

A Dynamic Routing Gateway connects the VCN bidirectionally, through VPN/FastConnect, to the customer's data center.