- A
Enable encryption on the existing DB instance by modifying the DB instance settings.
Why wrong: Modifying an existing unencrypted DB instance to enable encryption is not supported directly; you must create a new encrypted instance from a snapshot.
- B
Enable Transparent Data Encryption (TDE) on the MySQL instance.
Why wrong: RDS for MySQL does not support TDE; encryption at rest is handled by RDS using EBS volume encryption.
- C
Launch a new encrypted DB instance and migrate the data.
Launching a new RDS instance with encryption enabled is the simplest method, as encryption is specified at launch time.
- D
Use client-side encryption with AWS KMS to encrypt data before inserting into the database.
Why wrong: Client-side encryption adds application complexity and is not the simplest approach.
DBS-C01 Database Security Practice Question
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 storing sensitive customer data in an Amazon RDS for MySQL DB instance. They need to ensure that data is encrypted at rest. What is the simplest way to achieve this?
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
Launch a new encrypted DB instance and migrate the data.
Option B is correct because enabling encryption at rest on a new RDS instance is straightforward. Option A is wrong because enabling encryption on an existing unencrypted DB instance requires a snapshot and restore. Option C is wrong because client-side encryption is more complex and not the simplest. Option D is wrong because RDS does not natively support Transparent Data Encryption (TDE) for MySQL.
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 on the existing DB instance by modifying the DB instance settings.
Why it's wrong here
Modifying an existing unencrypted DB instance to enable encryption is not supported directly; you must create a new encrypted instance from a snapshot.
- ✗
Enable Transparent Data Encryption (TDE) on the MySQL instance.
Why it's wrong here
RDS for MySQL does not support TDE; encryption at rest is handled by RDS using EBS volume encryption.
- ✓
Launch a new encrypted DB instance and migrate the data.
Why this is correct
Launching a new RDS instance with encryption enabled is the simplest method, as encryption is specified at launch time.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use client-side encryption with AWS KMS to encrypt data before inserting into the database.
Why it's wrong here
Client-side encryption adds application complexity and is not the simplest approach.
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.
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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: Launch a new encrypted DB instance and migrate the data. — Option B is correct because enabling encryption at rest on a new RDS instance is straightforward. Option A is wrong because enabling encryption on an existing unencrypted DB instance requires a snapshot and restore. Option C is wrong because client-side encryption is more complex and not the simplest. Option D is wrong because RDS does not natively support Transparent Data Encryption (TDE) for MySQL.
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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