ANS-C01 Network Security, Compliance and Governance Practice Question
A company has multiple AWS accounts under AWS Organizations. The security team wants to centrally log all network traffic that is denied by security group rules across all accounts. Which approach meets this requirement with the least operational overhead?
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
✓
Enable VPC Flow Logs with organization-level aggregation and publish to a central S3 bucket
VPC Flow Logs can capture rejected traffic, and publishing to a central S3 bucket using Organization-level aggregation simplifies management. Option D is correct because it uses VPC Flow Logs with organization-level aggregation. Option A is wrong because AWS Config does not log network traffic. Option B is wrong because it requires per-account setup. Option C is wrong because CloudTrail does not capture network flows.
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 AWS Config rules for security group changes and send logs to a central account
Why it's wrong here
Config records configuration changes, not traffic flows.
- ✗
Create VPC Flow Logs in each account and publish to a central S3 bucket
Why it's wrong here
This works but requires individual setup; organization-level aggregation reduces overhead.
- ✗
Use AWS CloudTrail to log all API calls and filter for security group events
Why it's wrong here
CloudTrail logs API calls, not actual traffic.
- ✓
Enable VPC Flow Logs with organization-level aggregation and publish to a central S3 bucket
Why this is correct
Organization-level aggregation simplifies cross-account logging of rejected traffic.
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.