What is the requirement for connecting two VCNs in different regions?

To connect two Virtual Cloud Networks (VCNs) that are located in different regions, establishing a VCN remote peering connection is necessary. This type of connection allows resources in different regions to communicate securely over Oracle's backbone network, enabling efficient data transfer while maintaining high levels of security and performance.

Remote peering connections are specifically designed for such cross-region connectivity and provide a seamless integration between VCNs across different geographical locations. This setup is particularly useful in scenarios where applications need to share data or services between regions without traversing the public internet, thus enhancing security and reliability.

While local peering connections serve to connect VCNs within the same region, and VPN connections typically establish secure tunnels over the public internet (which may introduce latency and reliability concerns), a direct connect service is focused on establishing dedicated, private connections between on-premises infrastructure and Oracle Cloud, rather than connecting VCNs. Therefore, the optimal solution for connecting VCNs in different regions is clearly through VCN remote peering connections.