The image shows:

The customer premises equipment has a bi-directional connection to the DRG via OCI FastConnect. Internet devices have a bi-directional connection to the internet gateway via a web application firewall.

OCI Bastion goes to OCI Kubernetes Engine, which goes to OCI Search with OpenSearch, Database with PostgreSQL, and OCI Cache with Valkey, which has a bi-directional connection with the API gateway via cache hit.

The service gateway also goes to the Oracle services network.