A company requires SageMaker notebook instances to run inside a VPC with no internet access, and training data is in S3. Which approach satisfies the security requirement (no internet connectivity) while allowing SageMaker functionality?

The correct approach is to configure VPC interface endpoints (AWS PrivateLink) for necessary services like S3 and SageMaker APIs. This allows SageMaker notebook instances within a private VPC to communicate with AWS services without traversing the public internet, satisfying the "no internet access" requirement. Restricting security groups further enhances security by only permitting essential outbound connections. Incorrect options: Connecting via Site-to-Site VPN still involves internet access, which violates the "no internet access" requirement. An IAM policy controls permissions, not network connectivity. While important for security, it doesn't prevent network access if routes exist. Blocking all inbound and outbound traffic with security groups would prevent SageMaker from functioning at all, as it couldn't access S3 or SageMaker APIs.