DBS-C01 Database Security Practice Question
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 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
✓
Enable encryption in transit on the replication group.
Amazon ElastiCache for Redis supports encryption in transit using TLS (Transport Layer Security) when enabled on the replication group. This ensures data is encrypted between the application and the cache cluster. Option B is incorrect because encryption at rest protects data stored on disk, not data in transit. Option C is incorrect because AWS KMS customer master keys are used for encryption at rest, not for transit encryption. Option D is incorrect because VPC security groups control network access at the IP/port level, not encryption; allowing HTTPS traffic does not enable encryption for ElastiCache communication.
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.
- ✗
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.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.