DEA-C01 Data Security and Governance Practice Question
A company uses Amazon Redshift for data warehousing. The security team requires that all data in transit between the Redshift cluster and clients be encrypted. 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
✓
SSL/TLS encryption
Amazon Redshift supports SSL/TLS encryption for client connections to ensure data in transit is encrypted. Option A (Client-side VPN) is not a Redshift feature for encrypting client connections. Option C (AWS KMS key) is used for encrypting data at rest, not in transit. Option D (VPC peering) does not provide encryption of data in transit between the cluster and clients.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Client-side VPN
Why it's wrong here
A client-side VPN encrypts traffic on the public network path but does not enforce TLS on the Redshift connection itself, so data between client and cluster remains unencrypted at the protocol layer. It is tempting for securing remote access generally, yet the requirement is Redshift's own in-transit encryption setting.
- ✓
SSL/TLS encryption
Why this is correct
SSL/TLS encryption secures data in transit between clients and the Redshift cluster, directly satisfying the requirement that all traffic be encrypted. Redshift supports SSL connections, and enabling the `require_ssl` parameter forces every client connection to use TLS, preventing unencrypted access.
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AWS KMS key
Why it's wrong here
AWS KMS keys manage encryption at rest for Redshift, not encryption in transit; the correct mechanism is server-side SSL/TLS enforced via the `require_ssl` parameter or cluster security group rules. It is tempting because KMS is a central key management service often used for data protection, and in scenarios requiring encryption of stored data or EBS volumes, an AWS KMS key would be the correct choice.
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VPC peering
Why it's wrong here
VPC peering provides private network routing between VPCs but does not encrypt the Redshift connection; traffic still travels unencrypted unless TLS is enforced. It is tempting because it removes public exposure, but the requirement is encryption in transit, satisfied by the cluster's SSL setting.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DEA-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 DEA-C01 exam.