In this image, there are two Kubernetes control plane nodes, and two Kubernetes Worker nodes. There is an application connecting to the Oracle RAC Database on the Worker nodes. The application is connecting to the database over the Flannel network using the racnode-scan hostname, which resolves to a Node IP addresses of the Worker node where Oracle RAC pods are deployed, and where redundant network interface cards are located. Each database has public and private network connections, and a node port for service connections through the node port service. The Kubernetes ClusterIP are associated with nodePort services and connecting to Pod endpoints.