ANS-C01 Network Security, Compliance and Governance Practice Question
A company wants to enforce that all Amazon S3 buckets in an AWS account are encrypted at rest. Which AWS service can be used to automatically detect and report unencrypted buckets?
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
✓
AWS Config
AWS Config can evaluate resources against rules. The 's3-bucket-server-side-encryption-enabled' managed rule checks for encryption. CloudTrail logs API calls, GuardDuty detects threats, and Inspector assesses vulnerabilities.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS CloudTrail
Why it's wrong here
CloudTrail logs API calls but does not evaluate encryption status.
- ✗
Amazon GuardDuty
Why it's wrong here
GuardDuty detects malicious activity, not compliance.
- ✓
AWS Config
Why this is correct
AWS Config can use managed rules to check S3 bucket encryption.
- ✗
Amazon Inspector
Why it's wrong here
Inspector assesses vulnerabilities in EC2 instances, not S3.
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 ANS-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 ANS-C01 exam.