The image shows a high-availability (HA) production region (Ashburn), a database disaster recovery (DR) region (Phoenix), an on-premises data center, and a number of third party integrations, including Mulesoft (Saas), banking systems, software-as-a-service (SaaS) applications, and Microsoft Azure for Active Directory single sign-on (SSO). The third-party integrations connect to Oracle Cloud through the partner's data center private network by using a customer-premises router and then into the virtual cloud network (VCN) by using Oracle Autonomous Transaction Processing.

The production region (Ashburn) has 2 availability domains, 1 virtual cloud network (VCN) with 5 subnets, and the following additional resources through a service gateway on the VCN:

• Auditing
• Policies
• Logging
• Object storage

The VCN provides the following additional gateways:

• Internet gateway: Provides communications between public subnets and remote users over the internet.
• Service gateway: VCNs communicate with services such as object storage over the Oracle network fabric without traversing the internet.
• Dynamic routing gateway (DRG): Provides private connectivity between on-premises networks and VCNs by using Site-to-Site VPN or FastConnect.

The VCN provides the following subnets, each with their own security lists and route tables.

• Load balancer (public subnet): Contains dedicated load balancer in availability domain 1 that handles incoming traffic for PeopleSoft FSCM, Phire, Vertex, and PeoplSoft HCM.
• Authentication (public subnet): An OKTA Access Gateway (OAG) in availability domain 2 provides authentication and single sign-on (SSO).
• Web and app servers (private subnet): Provides dedicated web and app servers for FSCM, Phire, and HCM, and a dedicated web server for Vertex. The subnet also provides Elastic Search, an EFT virtual machine (VM), and separate file server instances for FSCM and HCM. The web and app servers communicate with their associated database in the primary database subnet and with Rackware in the DR region.
• Web and app servers-HA (private subnet): Provides high-availability dedicated web and app servers for FSCM, Phire, and HCM. The web and app servers communicate with their associated database in the primary database subnet.
• Primary database (private subnet): Provides dedicated instances of Oracle Autonomous Transaction Processing on Dedicated Infrastructure for FSCM, Phire, Vertex, and HCM in availability domain 1. Primary databases use Data Guard to replicate to corresponding instances in the DR region.

The disaster recover region (Phoenix) has 1 availability domain, 1 virtual cloud network (VCN) with 2 subnets, each of which provides their own security lists and route tables:

• Standby database (private subnet): Provides dedicated instances of Oracle Autonomous Transaction Processing on Dedicated Infrastructure for FSCM, Phire, Vertex, and HCM in availability domain 1.
• Rackware (private subnet): Provides disaster recovery snapshots of web and app servers.