Quick Answer
The answer is AWS Transit Gateway Network Manager, because it is the only service that combines detailed network metrics with path visualization for VPN packet loss troubleshooting. This tool constructs a real-time network topology from your AWS Transit Gateway attachments, including VPN tunnels, and displays the exact data path between your EC2 instance and on-premises server, allowing you to pinpoint where packets are being dropped. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this question tests your ability to distinguish between network-layer diagnostics and application-layer tools; a common trap is choosing AWS X-Ray for its “path” name, but X-Ray traces application requests, not network packets. Another trap is VPC Flow Logs, which give metadata but no visual path. Remember the mnemonic “TGNM for the Network Map” — if you need to see the road, not just the traffic logs, think Transit Gateway Network Manager.
This ANS-C01 practice question tests your understanding of network management and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 network engineer is monitoring network performance between an EC2 instance and an on-premises server using AWS VPN. The engineer notices intermittent packet loss. Which AWS service can provide detailed network metrics and path visualization to troubleshoot?
Amazon CloudWatch
Why wrong: CloudWatch provides metrics but not path visualization.
VPC Flow Logs
Why wrong: Flow Logs capture metadata but not path visualization.
AWS Transit Gateway Network Manager
Network Manager provides topology and monitoring for VPN and Direct Connect.
AWS X-Ray
Why wrong: X-Ray is for application tracing, not network path.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Transit Gateway Network Manager
AWS X-Ray is for application tracing, not network path. VPC Flow Logs provide packet metadata but not path visualization. Amazon CloudWatch can monitor VPN tunnels but not path. AWS Transit Gateway Network Manager provides network topology and path visualization.
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.
Amazon CloudWatch
Why it's wrong here
CloudWatch provides metrics but not path visualization.
VPC Flow Logs
Why it's wrong here
Flow Logs capture metadata but not path visualization.
AWS Transit Gateway Network Manager
AWS X-Ray
Why it's wrong here
X-Ray is for application tracing, not network path.
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.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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: AWS Transit Gateway Network Manager — AWS X-Ray is for application tracing, not network path. VPC Flow Logs provide packet metadata but not path visualization. Amazon CloudWatch can monitor VPN tunnels but not path. AWS Transit Gateway Network Manager provides network topology and path visualization.
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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