The image shows two OCI regions Region 1 and Region 2.
Region 1 includes VCN 1 with IP address 10.0.0.0/16 using DRG1 that connects using a Remote Peering Connection RPC1 to connect to Region 2.
Region 2 is similar to Region 1 and hosts VCN 2 with IP address 192.168.0.0/16. VCN 2 connects to Region 1 using DRG2 and RPC2.