ANS-C01 Network Security, Compliance and Governance Practice Question
A company is using AWS Organizations to manage multiple accounts. The security team wants to enforce that all S3 buckets across the organization are encrypted with SSE-S3. Which control mechanism should they use?
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
✓
Create a service control policy (SCP) that denies PutBucketEncryption if the encryption is not SSE-S3.
A service control policy (SCP) in AWS Organizations can deny PutBucketEncryption unless SSE-S3 is specified, enforcing encryption across all accounts. Option A is wrong because IAM policies are account-level and cannot enforce across all accounts in an organization. Option B is wrong because bucket policies are per-bucket and would require manual configuration on each bucket. Option D is wrong because CloudTrail is a logging service that does not enforce compliance; it only provides monitoring after the fact.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Assign an IAM policy to all users that requires SSE-S3.
Why it's wrong here
Does not cover all principals, e.g., service roles.
- ✗
Configure a bucket policy on each bucket to deny writes without SSE-S3.
Why it's wrong here
Requires manual configuration per bucket.
- ✓
Create a service control policy (SCP) that denies PutBucketEncryption if the encryption is not SSE-S3.
Why this is correct
SCPs can enforce policies across all accounts in the organization.
- ✗
Use AWS CloudTrail to monitor and alert on non-compliant bucket creations.
Why it's wrong here
Only alerts, does not enforce.
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 |
Go deeper
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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.