What must be added to the Route Table to enable access from a private compute instance to OCI Object Storage through a Service Gateway?

To enable access from a private compute instance to Oracle Cloud Infrastructure (OCI) Object Storage through a Service Gateway, adding a rule with the Service Gateway as the target is necessary. The Service Gateway allows private instances to access Oracle services, such as Object Storage, directly without requiring a public IP or internet access.

By configuring a specific route rule that directs traffic destined for the Object Storage service through the Service Gateway, the private compute instance can communicate with Object Storage seamlessly. This design enhances security by avoiding exposure to the public internet, as the communication occurs entirely within Oracle’s secure infrastructure.

The other options focus on details that are not relevant to enabling access specifically through the Service Gateway. For example, adding stateful rules for ingress or egress traffic implies direct interactions with external networks, which isn't necessary when utilizing the Service Gateway. Additionally, simply using the default security list may not provide the necessary routing or service access without specifying the Service Gateway in the route table. Thus, the requirement here is to explicitly define the route that targets the Service Gateway for successful communication with Object Storage.