AWS Certified DevOps Engineer – Professional (DOP-C02) — Question 194

A company's organization in AWS Organizations has a single OU. The company runs Amazon EC2 instances in the OU accounts. The company needs to limit the use of each EC2 instance’s credentials to the specific EC2 instance that the credential is assigned to. A DevOps engineer must configure security for the EC2 instances.

Which solution will meet these requirements?

Answer options

• A. Create an SCP that specifies the VPC CIDR block. Configure the SCP to check whether the value of the aws:VpcSourcelp condition key is in the specified block. In the same SCP check, check whether the values of the aws:EC2InstanceSourcePrivatelPv4 and aws:SourceVpc condition keys are the same. Deny access if either condition is false. Apply the SCP to the OU.
• B. Create an SCP that checks whether the values of the aws:EC2InstanceSourceVPC and aws:SourceVpc condition keys are the same. Deny access if the values are not the same. In the same SCP check, check whether the values of the aws:EC2InstanceSourcePrivateIPv4 and aws:VpcSourceIp condition keys are the same. Deny access if the values are not the same. Apply the SCP to the OU.
• C. Create an SCP that includes a list of acceptable VPC values and checks whether the value of the aws:SourceVpc condition key is in the list. In the same SCP check, define a list of acceptable IP address values and check whether the value of the aws:VpcSourceIp condition key is in the list. Deny access if either condition is false. Apply the SCP to each account in the organization.
• D. Create an SCP that checks whether the values of the aws:EC2InstanceSourceVPC and aws:VpcSourceIp condition keys are the same. Deny access if the values are not the same. In the same SCP check, check whether the values of the aws:EC2InstanceSourcePrivateIPv4 and aws:SourceVpc condition keys are the same. Deny access if the values are not the same. Apply the SCP to each account in the organization.

Correct answer: B

Explanation

The correct answer, B, effectively ensures that the source VPC and private IP of the EC2 instance are consistently validated against the context of the request, which aligns with limiting credentials to their respective instances. Options A and C introduce unnecessary complexity or incorrect conditions, while D applies the SCP too broadly by affecting all accounts instead of just the OU.