A SageMaker AI pipeline runs distributed processing and training inside a private VPC. To encrypt network communication between instances participating in distributed jobs, what should the ML engineer enable?

Enabling inter-container traffic encryption ensures that data exchanged between containers participating in distributed processing and training jobs within your private VPC is encrypted. This is crucial for securing sensitive data during transit. Network isolation is a broader security measure that restricts network access but doesn't inherently encrypt traffic between instances. Security groups control inbound and outbound traffic at the instance level but don't provide encryption for traffic between instances within the same security group or VPC. VPC Flow Logs record IP traffic information for your VPC, which is useful for monitoring and troubleshooting, but it does not encrypt the traffic itself.