This DBS-C01 practice question tests your understanding of database security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 healthcare company is migrating its patient records database to Amazon RDS for SQL Server. The database contains Protected Health Information (PHI). The compliance team requires that all PHI data be encrypted at rest and that the encryption keys be stored in a dedicated AWS CloudHSM cluster. Additionally, the database must be replicated to a second AWS region for disaster recovery. The DBA has enabled RDS encryption at rest using a KMS key, but the compliance team insists on using CloudHSM. What should the DBA do to meet the compliance requirement while maintaining disaster recovery?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Transparent Data Encryption (TDE) using a CloudHSM key and create a cross-region read replica for DR.
Option B is correct because RDS for SQL Server supports Transparent Data Encryption (TDE) which can use CloudHSM as the key store. Multi-AZ deployments support cross-region read replicas, allowing DR. Option A is wrong because RDS encryption at rest cannot use CloudHSM directly. Option C is wrong because moving to DynamoDB is unnecessary and does not use CloudHSM. Option D is wrong because using an RDS Custom instance with TDE and manual replication is more complex and not recommended.
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.
✗
Use RDS encryption at rest with a KMS key backed by CloudHSM (custom key store).
Why it's wrong here
RDS does not support custom key stores for encryption at rest.
✗
Migrate the database to Amazon DynamoDB with encryption using CloudHSM via KMS custom key store.
Why it's wrong here
DynamoDB encryption does not use CloudHSM directly.
✗
Use an RDS Custom for SQL Server instance and configure TDE with CloudHSM, then set up log shipping to another region.
Why it's wrong here
RDS Custom is more complex and not necessary.
✓
Enable Transparent Data Encryption (TDE) using a CloudHSM key and create a cross-region read replica for DR.
Why this is correct
TDE supports CloudHSM and cross-region replicas.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
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: Enable Transparent Data Encryption (TDE) using a CloudHSM key and create a cross-region read replica for DR. — Option B is correct because RDS for SQL Server supports Transparent Data Encryption (TDE) which can use CloudHSM as the key store. Multi-AZ deployments support cross-region read replicas, allowing DR. Option A is wrong because RDS encryption at rest cannot use CloudHSM directly. Option C is wrong because moving to DynamoDB is unnecessary and does not use CloudHSM. Option D is wrong because using an RDS Custom instance with TDE and manual replication is more complex and not recommended.
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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Question Discussion
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