Which of the following is a customer responsibility according to the AWS shared responsibility model?
Apply security patches for Amazon S3 infrastructure devices.
Provide physical security for AWS datacenters.
Install operating system updates on Lambda@Edge.
Implement multi-factor authentication (MFA) for IAM user accounts.
Explanations:
Customers do not apply security patches for AWS infrastructure devices; this is managed by AWS.
Physical security for AWS datacenters is the responsibility of AWS, not the customer.
Customers do not install operating system updates on Lambda@Edge, as this is a managed service and AWS handles the underlying infrastructure.
Implementing multi-factor authentication (MFA) for IAM user accounts is a customer responsibility under the AWS shared responsibility model.
I suspect that the answer is:
Implement multi-factor authentication (MFA) for IAM user accounts.