This DBS-C01 practice question tests your understanding of database security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 using Amazon RDS for Oracle and needs to comply with regulatory requirements that mandate encryption of all data at rest and in transit. Which TWO actions should be taken to meet these requirements?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable encryption at rest by specifying a KMS key when creating the DB instance.
Options A and C are correct. Option A: Encryption at rest is enabled via the console or API when creating the instance. Option C: Encryption in transit is enforced by setting rds.force_ssl=1 and using SSL certificates. Option B is wrong because native network encryption is an alternative but not the recommended approach; RDS supports Oracle native network encryption but it is less secure than SSL/TLS. Option D is wrong because TDE is for encryption at rest but is a separate feature; however, enabling encryption at rest via RDS is sufficient. Option E is wrong because CloudWatch Logs encryption is for logs, not the database itself.
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.
✓
Enable encryption at rest by specifying a KMS key when creating the DB instance.
Why this is correct
This encrypts the database storage.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use Oracle Transparent Data Encryption (TDE) to encrypt the data at rest.
Why it's wrong here
TDE is an option but encryption at rest via RDS is more integrated.
✗
Enable encryption for CloudWatch Logs.
Why it's wrong here
This encrypts logs, not the database itself.
✗
Configure Oracle Native Network Encryption in the sqlnet.ora file.
Why it's wrong here
While possible, RDS recommends using SSL/TLS for encryption in transit.
✓
Enable SSL/TLS encryption by setting the rds.force_ssl parameter and using the RDS SSL certificate.
Why this is correct
This enforces encryption in transit.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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 encryption at rest by specifying a KMS key when creating the DB instance. — Options A and C are correct. Option A: Encryption at rest is enabled via the console or API when creating the instance. Option C: Encryption in transit is enforced by setting rds.force_ssl=1 and using SSL certificates. Option B is wrong because native network encryption is an alternative but not the recommended approach; RDS supports Oracle native network encryption but it is less secure than SSL/TLS. Option D is wrong because TDE is for encryption at rest but is a separate feature; however, enabling encryption at rest via RDS is sufficient. Option E is wrong because CloudWatch Logs encryption is for logs, not the database itself.
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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