The answer is to enable encryption in transit on the replication group. This is correct because Amazon ElastiCache for Redis uses TLS (Transport Layer Security) to encrypt data as it moves between your application and the cache cluster, ensuring that sensitive information cannot be intercepted during transmission. On the AWS Certified Database Specialty DBS-C01 exam, this concept tests your understanding of the distinct security layers for ElastiCache: encryption in transit protects data in motion, while encryption at rest (often using KMS) protects stored data, and security groups only control network access, not encryption. A common trap is confusing encryption at rest with encryption in transit, or assuming KMS handles both. Remember the mnemonic "TLS for Travel, KMS for Keep" to distinguish that TLS secures data moving across the network, while KMS secures data stored on disk.
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 uses Amazon ElastiCache for Redis and needs to encrypt data in transit between the application and the cache cluster. Which feature should be enabled?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable encryption in transit on the replication group.
Option D is correct because ElastiCache for Redis supports encryption in transit using TLS. Option A is wrong because encryption at rest is separate. Option B is wrong because KMS is used for encryption at rest, not transit. Option C is wrong because security groups control network access, not encryption.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 in transit on the replication group.
Why this is correct
ElastiCache for Redis supports TLS encryption for data in transit.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable encryption at rest.
Why it's wrong here
Encryption at rest protects data on disk, not in transit.
✗
Use AWS KMS customer master keys.
Why it's wrong here
KMS is used for key management, not for enabling TLS.
✗
Configure the VPC security group to allow only HTTPS traffic.
Why it's wrong here
Security groups do not enable encryption; they control access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Database Security — This question tests Database Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable encryption in transit on the replication group. — Option D is correct because ElastiCache for Redis supports encryption in transit using TLS. Option A is wrong because encryption at rest is separate. Option B is wrong because KMS is used for encryption at rest, not transit. Option C is wrong because security groups control network access, not encryption.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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