- A
NAT Gateway
Correct. NAT Gateway centralizes outbound internet traffic, and combined with VPC Flow Logs, you can log all traffic. This satisfies both requirements.
- B
Network ACL
Why wrong: Network ACLs are stateless and control traffic at the subnet level, but they do not specifically handle outbound internet traffic and do not log by themselves.
- C
VPC Flow Logs
Why wrong: VPC Flow Logs only log traffic metadata; they do not control or block traffic.
- D
VPC Traffic Mirroring
Why wrong: VPC Traffic Mirroring copies traffic for inspection but does not control or block it. It cannot enforce outbound policies on its own.
Question 610 of 1,705
ANS-C01 NAT Gateway Practice Question
This ANS-C01 practice question tests your understanding of network implementation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. A key principle to apply: nAT Gateway. 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 has a VPC with multiple subnets. They want to centrally control outbound traffic to the internet and log all traffic. Which AWS service 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
✓
NAT Gateway
NAT Gateway provides centralized outbound internet access for instances in private subnets. While it does not natively log traffic, you can enable VPC Flow Logs on the VPC to capture metadata of all traffic, including that traversing the NAT Gateway. This combination meets both the control and logging requirements. Other options either fail to control traffic (VPC Traffic Mirroring only copies, VPC Flow Logs only logs) or provide control at a different level (Network ACL is stateless and subnet-level).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
NAT Gateway
- ✗
Network ACL
Why it's wrong here
Network ACLs are stateless and control traffic at the subnet level, but they do not specifically handle outbound internet traffic and do not log by themselves.
- ✗
VPC Flow Logs
Why it's wrong here
VPC Flow Logs only log traffic metadata; they do not control or block traffic.
- ✗
VPC Traffic Mirroring
Why it's wrong here
VPC Traffic Mirroring copies traffic for inspection but does not control or block it. It cannot enforce outbound policies on its own.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often assume VPC Traffic Mirroring can both control and log, but it only copies traffic; it does not enforce policies. The correct approach is to use a service that actually controls outbound traffic, such as NAT Gateway, and add logging via VPC Flow Logs.
Detailed technical explanation
How to think about this question
VPC Traffic Mirroring uses the Geneve encapsulation protocol (UDP port 6081) to duplicate packets from elastic network interfaces (ENIs) to a monitoring appliance, such as a security appliance or a packet broker. This allows deep packet inspection (DPI) of all outbound traffic, including payloads, which is essential for compliance and threat detection. In a real-world scenario, a company might use Traffic Mirroring to send all outbound traffic to a third-party NGFW for malware analysis while retaining the original traffic flow.
KKey Concepts to Remember
- NAT Gateway
- VPC Flow Logs
- Centralized outbound traffic control
TExam Day Tips
- 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
NAT Gateway
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review nAT Gateway, then practise related ANS-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — NAT Gateway.
What is the correct answer to this question?
The correct answer is: NAT Gateway — NAT Gateway provides centralized outbound internet access for instances in private subnets. While it does not natively log traffic, you can enable VPC Flow Logs on the VPC to capture metadata of all traffic, including that traversing the NAT Gateway. This combination meets both the control and logging requirements. Other options either fail to control traffic (VPC Traffic Mirroring only copies, VPC Flow Logs only logs) or provide control at a different level (Network ACL is stateless and subnet-level).
What should I do if I get this ANS-C01 question wrong?
Review nAT Gateway, then practise related ANS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
NAT Gateway
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Last reviewed: Jul 4, 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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