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Your company utilizes a hybrid cloud architecture, connecting its on-premises network to an OCIVCN using a FastConnect private peering connection. You need to ensure that instances within a specific subnet in the VCN can only communicate with resources in a designated IP address range within the on-premises network. What is the MOST effective way to achieve this specific network isolation?
Correct Answer: C
* Goal: Restrict subnet traffic to a specific on-premises IP range via FastConnect. * Option A: Internet Gateway is for public access, not FastConnect-incorrect. * Option B: Default security list applies broadly, lacking granularity; NSGs are more effective-less optimal. * Option C: Custom route table with DRG ensures FastConnect routing; NSGs provide precise, instance- level traffic restriction-correct. * Option D: LPG is for same-region VCN peering, not on-premises-incorrect. * Conclusion: Option C is the most effective method. Oracle notes: * "Use a custom route table with a DRG route rule for FastConnect traffic. NSGs offer granular control to restrict traffic to specific IP ranges."This supports Option C. Reference:FastConnect and NSG Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm & docs.oracle.com/en-us/iaas/Content/Network/Concepts/NSGs.htm).
