ANS-C01 Network Security, Compliance and Governance Practice Question
A company wants to monitor and log all network traffic within a VPC for security analysis. Which THREE services can be used to achieve this?
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
✓
VPC Flow Logs
VPC Flow Logs capture IP traffic information for network interfaces in a VPC, enabling monitoring and logging. AWS Network Firewall provides stateful inspection and logs traffic that passes through the firewall. AWS Traffic Mirroring replicates network traffic from an elastic network interface for analysis. Amazon CloudWatch is a monitoring service that can collect logs but does not directly capture network traffic. Amazon S3 is object storage and cannot capture or log network traffic itself.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
VPC Flow Logs
Why this is correct
VPC Flow Logs capture metadata about IP traffic.
- ✗
Amazon CloudWatch
Why it's wrong here
CloudWatch monitors metrics and logs, but does not capture network traffic.
- ✓
AWS Network Firewall
Why this is correct
Network Firewall can log traffic that passes through it.
- ✓
AWS Traffic Mirroring
Why this is correct
Traffic Mirroring copies traffic for inspection.
- ✗
Amazon S3
Why it's wrong here
S3 is storage, not a capture service.
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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Same concept, more angles
2 more ways this is tested on ANS-C01
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 needs to log all network traffic to and from EC2 instances for security analysis. Which TWO services can capture this data? (Choose 2)
easy- A.AWS Config
- ✓ B.VPC Flow Logs
- C.AWS CloudTrail
- ✓ D.Traffic Mirroring
- E.Amazon CloudWatch Logs
Why B: Options B and D are correct. VPC Flow Logs capture metadata (IP addresses, ports, protocols) about network traffic. Traffic Mirroring captures actual packet content for deep packet inspection. Option A (AWS Config) is incorrect because it records configuration changes, not network traffic. Option C (AWS CloudTrail) is incorrect because it logs API calls, not network traffic. Option E (Amazon CloudWatch Logs) is incorrect because it is for log storage and monitoring, not for capturing network traffic.
Variation 2. Which TWO AWS services can be used to monitor and log network traffic in a VPC for security analysis? (Choose two.)
easy- ✓ A.VPC Flow Logs
- B.AWS Config
- ✓ C.AWS CloudTrail
- D.Amazon Inspector
- E.Amazon GuardDuty
Why A: Options A and C are correct. VPC Flow Logs capture IP traffic information for network interfaces in a VPC, enabling security analysis of traffic patterns. AWS CloudTrail logs API calls to the AWS Management Console and SDKs, providing visibility into user activity and resource changes. Option B (AWS Config) is incorrect because it evaluates resource configurations for compliance, not network traffic logging. Option D (Amazon Inspector) is a vulnerability assessment service that scans for software vulnerabilities and unintended network exposure. Option E (Amazon GuardDuty) is a threat detection service that analyzes data sources like DNS logs and VPC Flow Logs, but it is not itself a logging service for network traffic.
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.