- A
CloudWatch Metrics for Transit Gateway.
Why wrong: Metrics show aggregate data, not per-flow byte counts.
- B
VPC Flow Logs for each VPC.
Flow Logs capture individual flow data including byte counts.
- C
AWS Config rules.
Why wrong: Config tracks configuration changes, not traffic.
- D
AWS CloudTrail logs.
Why wrong: CloudTrail records API calls, not network traffic.
Question 1,085 of 1,705
How to Monitor Data Transfer Between VPCs for Cost Allocation with VPC Flow Logs
This ANS-C01 practice question tests your understanding of network management and operations. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company uses AWS Transit Gateway to connect multiple VPCs and on-premises networks. The network team wants to monitor the amount of data transferred between VPCs for cost allocation. Which AWS feature 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
✓
VPC Flow Logs for each VPC.
Option B is correct because VPC Flow Logs can be published to CloudWatch Logs or S3 and provide network traffic logs that include source/destination IP, ports, and byte counts, which can be used for cost allocation. Option A is wrong because CloudWatch Metrics for Transit Gateway only show aggregate metrics like bytes in/out per attachment, not per-flow. Option C is wrong because AWS Config records resource configuration changes, not traffic. Option D is wrong because CloudTrail records API calls.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
CloudWatch Metrics for Transit Gateway.
Why it's wrong here
Metrics show aggregate data, not per-flow byte counts.
- ✓
VPC Flow Logs for each VPC.
Why this is correct
Flow Logs capture individual flow data including byte counts.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Config rules.
Why it's wrong here
Config tracks configuration changes, not traffic.
- ✗
AWS CloudTrail logs.
Why it's wrong here
CloudTrail records API calls, not network traffic.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Metrics show aggregate data, not per-flow byte counts.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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 |
What to study next
Got this wrong? Here's your next step.
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Management and Operations — This question tests Network Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: VPC Flow Logs for each VPC. — Option B is correct because VPC Flow Logs can be published to CloudWatch Logs or S3 and provide network traffic logs that include source/destination IP, ports, and byte counts, which can be used for cost allocation. Option A is wrong because CloudWatch Metrics for Transit Gateway only show aggregate metrics like bytes in/out per attachment, not per-flow. Option C is wrong because AWS Config records resource configuration changes, not traffic. Option D is wrong because CloudTrail records API calls.
What should I do if I get this ANS-C01 question wrong?
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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.
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