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?
CloudWatch Metrics for Transit Gateway.
Why wrong: Metrics show aggregate data, not per-flow byte counts.
VPC Flow Logs for each VPC.
Flow Logs capture individual flow data including byte counts.
AWS Config rules.
Why wrong: Config tracks configuration changes, not traffic.
AWS CloudTrail logs.
Why wrong: CloudTrail records API calls, not network traffic.
Answer choices
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: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
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
Static NAT maps one inside address to one outside address.
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
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
Metrics show aggregate data, not per-flow byte counts.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
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.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Network Management and Operations — This question tests Network Management and Operations — Static NAT maps one inside address to one outside address..
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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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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