The image shows the logical architecture that enables hybrid integration by using an Oracle API Gateway. . It contains four components:

• Oracle Cloud applications, particularly Oracle Fusion applications.
• An on-premises site, comprising customer systems and internal users.
• An OCI region, comprising logical layers, which contain an API Gateway within an access component and Oracle Integration instance within a Integration component.
• An ID domain.
• The Internet, which contains other Oracle cloud services and external users.

Traffic flows as follows:

• The internal users and external user both access Oracle Intergration through the ID domain, which directs traffic to Oracle Integration and then on to the API Gateway.
• Traffic travels bidirectionally between the other Oracle cloud services and Oracle Integration, which passes it to the Oracle Fusion Applications.
• The on-premises customer systems exchange data with the Oracle Integration, which passes data through the private endpoint and on the private resources.
• Oracle Integration exchanges data with other Oracle cloud services on the Internet.