Your company needs to connect an on-premises data center to an OCI Virtual Cloud Network...

Requirements: Secure, reliable, low-latency, bidirectional access with redundancy.

Option A: VPN via DRG is secure but lacks low latency and redundancy—insufficient.

Option B: FastConnect via DRG offers low latency and security but no redundancy—partial fit.

Option C: Public endpoints are insecure and high-latency—incorrect.

Option D: FastConnect for primary low-latency access, VPN as backup for redundancy—correct and most appropriate.

Conclusion: Option D meets all criteria.

Oracle states:

"FastConnect with DRG provides secure, low-latency hybrid connectivity. Add a Site-to-Site VPN for redundancy to ensure reliability."This supports Option D. Reference:Hybrid Cloud Connectivity - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/hybridcloud.htm).