This DBS-C01 practice question tests your understanding of database security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 an on-premises Oracle database to Amazon RDS for Oracle. The database contains sensitive data that must be encrypted at rest using a customer-managed KMS key. The company also needs to ensure that the database is automatically patched by AWS. Which DB instance configuration should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Multi-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade enabled.
The correct answer is C because a Multi-AZ deployment with encryption at rest using a customer-managed KMS key satisfies the encryption requirement, and enabling auto minor version upgrade ensures automatic patching. Option A is incorrect because a Single-AZ deployment with encryption at rest does not provide high availability. Option B is incorrect because a Multi-AZ deployment without encryption does not meet the encryption requirement. Option D is incorrect because a Single-AZ deployment with encryption at rest but without auto minor version upgrade would not automatically apply patches.
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.
✗
Single-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade disabled.
Why it's wrong here
Auto minor version upgrade must be enabled.
✓
Multi-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade enabled.
Why this is correct
Meets all requirements.
Related concept
Static NAT maps one inside address to one outside address.
✗
Single-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade enabled.
Why it's wrong here
Single-AZ lacks high availability.
✗
Multi-AZ, encryption at rest enabled with an AWS-managed KMS key, auto minor version upgrade enabled.
Why it's wrong here
Requires customer-managed KMS key.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: Multi-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade enabled. — The correct answer is C because a Multi-AZ deployment with encryption at rest using a customer-managed KMS key satisfies the encryption requirement, and enabling auto minor version upgrade ensures automatic patching. Option A is incorrect because a Single-AZ deployment with encryption at rest does not provide high availability. Option B is incorrect because a Multi-AZ deployment without encryption does not meet the encryption requirement. Option D is incorrect because a Single-AZ deployment with encryption at rest but without auto minor version upgrade would not automatically apply patches.
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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