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Question 157 - SCS-C02 discussion

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A company is designing a new application stack. The design includes web servers and backend servers that are hosted on Amazon EC2 instances. The design also includes an Amazon Aurora MySQL DB cluster.

The EC2 instances are m an Auto Scaling group that uses launch templates. The EC2 instances for the web layer and the backend layer are backed by Amazon Elastic Block Store (Amazon EBS) volumes. No layers are encrypted at rest. A security engineer needs to implement encryption at rest.

Which combination of steps will meet these requirements? (Select TWO.)

A.
Modify EBS default encryption settings in the target AWS Region to enable encryption. Use an Auto Scaling group instance refresh.
Answers
A.
Modify EBS default encryption settings in the target AWS Region to enable encryption. Use an Auto Scaling group instance refresh.
B.
Modify the launch templates for the web layer and the backend layer to add AWS Certificate Manager (ACM) encryption for the attached EBS volumes. Use an Auto Scaling group instance refresh.
Answers
B.
Modify the launch templates for the web layer and the backend layer to add AWS Certificate Manager (ACM) encryption for the attached EBS volumes. Use an Auto Scaling group instance refresh.
C.
Create a new AWS Key Management Service (AWS KMS) encrypted DB cluster from a snapshot of the existing DB cluster.
Answers
C.
Create a new AWS Key Management Service (AWS KMS) encrypted DB cluster from a snapshot of the existing DB cluster.
D.
Apply AWS Key Management Service (AWS KMS) encryption to the existing DB cluster.
Answers
D.
Apply AWS Key Management Service (AWS KMS) encryption to the existing DB cluster.
E.
Apply AWS Certificate Manager (ACM) encryption to the existing DB cluster.
Answers
E.
Apply AWS Certificate Manager (ACM) encryption to the existing DB cluster.
Suggested answer: A, C

Explanation:

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Overview.Encryption.html

https://aws.amazon.com/premiumsupport/knowledge-center/ebs-automatic-encryption/

To implement encryption at rest for both the EC2 instances and the Aurora DB cluster, the following steps are required:

For the EC2 instances, modify the EBS default encryption settings in the target AWS Region to enable encryption. This will ensure that any new EBS volumes created in that Region are encrypted by default using an AWS managed key. Alternatively, you can specify a customer managed key when creating new EBS volumes. For more information, see Amazon EBS encryption.

Use an Auto Scaling group instance refresh to replace the existing EC2 instances with new ones that have encrypted EBS volumes attached. An instance refresh is a feature that helps you update all instances in an Auto Scaling group in a rolling fashion without the need to manage the instance replacement process manually. For more information, see Replacing Auto Scaling instances based on an instance refresh.

For the Aurora DB cluster, create a new AWS Key Management Service (AWS KMS) encrypted DB cluster from a snapshot of the existing DB cluster. You can use either an AWS managed key or a customer managed key to encrypt the new DB cluster. You cannot enable or disable encryption for an existing DB cluster, so you have to create a new one from a snapshot. For more information, see Encrypting Amazon Aurora resources.

The other options are incorrect because they either do not enable encryption at rest for the resources (B, D), or they use the wrong service for encryption (E).

Verified

Reference:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSEncryption.html

https://docs.aws.amazon.com/autoscaling/ec2/userguide/asg-instance-refresh.html

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Overview.Encryption.html

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asked 16/09/2024
Miguel Monteiro
38 questions
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