Question 841 of 1,663
DBS-C01 Database Security Practice Question
A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The security team requires that all data be encrypted at rest using a customer-managed KMS key. Additionally, the database should be accessible only from a specific VPC. Which THREE steps should the database specialist take to meet these requirements? (Choose three.)
⚠ Common exam trap
Many candidates confuse VPC endpoints with network access control, thinking a VPC endpoint restricts access to the database, when in fact it only provides a private connection path without limiting which resources can connect.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the security group for the RDS instance to allow inbound traffic only from the application security group.
Security groups act as a virtual firewall for RDS instances. By configuring the security group to allow inbound traffic only from the application security group, you restrict database access to specific application servers, meeting the requirement that the database be accessible only from a specific VPC.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure the security group for the RDS instance to allow inbound traffic only from the application security group.
Why this is correct
This restricts access to the application's security group.
- ✓
Launch the RDS instance in a private subnet of the VPC.
Why this is correct
A private subnet prevents public internet access.
- ✗
Create a VPC endpoint for RDS and associate it with the DB instance.
Why it's wrong here
VPC endpoints are not used for DB instances; they are for accessing AWS services privately.
- ✗
Store the encryption key in Amazon S3 and configure RDS to use it.
Why it's wrong here
KMS keys are not stored in S3; they are managed by KMS.
- ✓
Enable encryption at rest using a customer-managed KMS key when creating the RDS instance.
Why this is correct
This meets the encryption requirement.
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Last reviewed: Jun 11, 2026
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