DEA-C01 Data Security and Governance Practice Question
A company is using Amazon EMR with Kerberos authentication. They want to ensure that data in transit between EMR cluster nodes is encrypted. Which configuration should be applied?
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
✓
Configure the EMR cluster to use in-transit encryption.
Enabling in-transit encryption in Amazon EMR uses TLS to encrypt data between nodes, ensuring data in transit is encrypted. Option A is incorrect because VPC peering does not provide encryption; it is a network connectivity feature. Option C is incorrect because S3 server-side encryption encrypts data at rest, not in transit. Option D is incorrect because EBS encryption encrypts data at rest.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use VPC peering to connect the cluster nodes.
Why it's wrong here
VPC peering does not provide encryption.
- ✓
Configure the EMR cluster to use in-transit encryption.
Why this is correct
In-transit encryption uses TLS to protect data between nodes.
- ✗
Enable S3 server-side encryption for the cluster's output data.
Why it's wrong here
This encrypts data at rest, not in transit.
- ✗
Enable EBS encryption on the cluster instances.
Why it's wrong here
EBS encryption protects data at rest.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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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.