- A
Create the RDS instance without encryption, then use the AWS Console to enable encryption after creation using a customer-managed key.
Why wrong: RDS does not support enabling encryption on an existing unencrypted instance.
- B
Create the RDS instance with encryption using the default AWS managed service key, and set up automatic key rotation in KMS.
Why wrong: Default service key cannot have custom rotation or IAM role restrictions.
- C
Use AWS CloudHSM to generate and store the encryption key, and configure RDS to use the CloudHSM key for encryption.
Why wrong: RDS does not support CloudHSM for encryption; it uses KMS.
- D
Create the RDS instance with encryption enabled using a customer-managed KMS key, and configure the key policy to restrict access to the required IAM roles.
This meets encryption, key rotation, and access control requirements.
DBS-C01 Database Security Practice Question
This DBS-C01 practice question tests your understanding of database security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is migrating its on-premises Oracle database to Amazon RDS for Oracle. The security team requires that all data at rest be encrypted using a customer-managed key stored in AWS KMS, and that the key be rotated automatically every year. The company also needs to ensure that only specific IAM roles can access the key. Which combination of steps should the database administrator take to meet these requirements?
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
Create the RDS instance with encryption enabled using a customer-managed KMS key, and configure the key policy to restrict access to the required IAM roles.
Option B is correct because enabling encryption on the RDS instance with a customer-managed KMS key allows rotation and access control via KMS key policies. Option A is wrong because RDS does not support manual encryption after creation. Option C is wrong because default service key does not allow custom rotation. Option D is wrong because CloudHSM is not needed for this scenario.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create the RDS instance without encryption, then use the AWS Console to enable encryption after creation using a customer-managed key.
Why it's wrong here
RDS does not support enabling encryption on an existing unencrypted instance.
- ✗
Create the RDS instance with encryption using the default AWS managed service key, and set up automatic key rotation in KMS.
Why it's wrong here
Default service key cannot have custom rotation or IAM role restrictions.
- ✗
Use AWS CloudHSM to generate and store the encryption key, and configure RDS to use the CloudHSM key for encryption.
Why it's wrong here
RDS does not support CloudHSM for encryption; it uses KMS.
- ✓
Create the RDS instance with encryption enabled using a customer-managed KMS key, and configure the key policy to restrict access to the required IAM roles.
Why this is correct
This meets encryption, key rotation, and access control requirements.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Database Security — This question tests Database Security — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create the RDS instance with encryption enabled using a customer-managed KMS key, and configure the key policy to restrict access to the required IAM roles. — Option B is correct because enabling encryption on the RDS instance with a customer-managed KMS key allows rotation and access control via KMS key policies. Option A is wrong because RDS does not support manual encryption after creation. Option C is wrong because default service key does not allow custom rotation. Option D is wrong because CloudHSM is not needed for this scenario.
What should I do if I get this DBS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.
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