The answer is two required configurations: enabling encryption on the Redshift cluster using AWS KMS and configuring the cluster to require SSL connections. For data at rest, Redshift integrates directly with KMS to encrypt the underlying storage and snapshots, ensuring that all persisted data is unreadable without the proper key. For data in transit, enforcing SSL connections encrypts the network traffic between clients and the cluster, preventing interception during queries or data loads. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding that Redshift’s at-rest encryption is managed via KMS—not CloudHSM or EBS—and that in-transit encryption requires an explicit SSL requirement on the cluster, not just enabling VPC Flow Logs. A common trap is confusing EBS encryption (used for EC2, not Redshift’s managed storage) or assuming CloudHSM is supported natively. Memory tip: think “KMS for the disk, SSL for the wire.”
DEA-C01 Data Security and Governance Practice Question
This DEA-C01 practice question tests your understanding of data security and governance. 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 using Amazon Redshift for data warehousing. They need to ensure that data is encrypted at rest and in transit. Which TWO configurations are required to meet these requirements?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable encryption on the Redshift cluster using AWS KMS.
Options A and D are correct. To encrypt data at rest, enable encryption on the Redshift cluster using KMS (A). To encrypt data in transit, configure the cluster to use SSL (D). Option B is incorrect because VPC Flow Logs do not encrypt. Option C is incorrect because EBS encryption is not directly applicable to Redshift cluster storage. Option E is incorrect because Redshift does not support CloudHSM natively for encryption; it uses KMS for at-rest encryption.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 Redshift cluster using AWS KMS.
Use AWS CloudHSM to manage encryption keys for Redshift.
Why it's wrong here
Redshift does not support CloudHSM; it uses KMS.
✗
Enable VPC Flow Logs on the Redshift subnet.
Why it's wrong here
Flow Logs do not provide encryption.
✗
Enable EBS encryption on the Redshift cluster nodes.
Why it's wrong here
Redshift uses its own encryption; EBS encryption is not required.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DEA-C01 subnetting questions on CIDR, address ranges, and subnet selection.
Data Security and Governance — This question tests Data Security and Governance — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Enable encryption on the Redshift cluster using AWS KMS. — Options A and D are correct. To encrypt data at rest, enable encryption on the Redshift cluster using KMS (A). To encrypt data in transit, configure the cluster to use SSL (D). Option B is incorrect because VPC Flow Logs do not encrypt. Option C is incorrect because EBS encryption is not directly applicable to Redshift cluster storage. Option E is incorrect because Redshift does not support CloudHSM natively for encryption; it uses KMS for at-rest encryption.
What should I do if I get this DEA-C01 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DEA-C01 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. 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?
easy
A.Client-side VPN
✓ B.SSL/TLS encryption
C.AWS KMS key
D.VPC peering
Why B: Option C is correct because Redshift supports SSL/TLS encryption for client connections. Option A is wrong because VPC peering does not encrypt. Option B is wrong because Redshift doesn't use a VPN. Option D is wrong because KMS encrypts data at rest.
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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.
Question Discussion
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