- A
Establish a VPN connection to AWS and route S3 traffic through the VPN.
Why wrong: This adds complexity and still may use internet if not properly configured; gateway endpoint is simpler and more appropriate.
- B
Configure a NAT gateway in the public subnet and update the private subnet route table with a default route pointing to the NAT gateway.
Why wrong: This routes traffic through the internet, not private.
- C
Create a gateway VPC endpoint for S3 and add a route to the endpoint in the private subnet route table.
Gateway endpoints provide private access to S3 without traversing the internet.
- D
Attach an internet gateway to the VPC and add a route to the S3 prefix list in the private subnet route table.
Why wrong: This would route traffic through the internet gateway, which is not private.
ANS-C01 Network Security, Compliance and Governance Practice Question
This ANS-C01 practice question tests your understanding of network security, compliance and governance. 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. 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 has a VPC with public and private subnets. An application running in a private subnet needs to access an S3 bucket to read and write data. The security team wants to ensure that traffic to S3 does not traverse the internet. Which solution should the team implement?
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
Create a gateway VPC endpoint for S3 and add a route to the endpoint in the private subnet route table.
A gateway VPC endpoint for S3 allows instances in a private subnet to access S3 privately using AWS's internal network, without traversing the internet. By adding a route to the endpoint's prefix list in the private subnet route table, traffic destined for S3 is directed through the endpoint, which uses AWS PrivateLink to provide highly available, redundant connectivity.
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.
- ✗
Establish a VPN connection to AWS and route S3 traffic through the VPN.
Why it's wrong here
This adds complexity and still may use internet if not properly configured; gateway endpoint is simpler and more appropriate.
- ✗
Configure a NAT gateway in the public subnet and update the private subnet route table with a default route pointing to the NAT gateway.
Why it's wrong here
This routes traffic through the internet, not private.
- ✓
Create a gateway VPC endpoint for S3 and add a route to the endpoint in the private subnet route table.
Why this is correct
Gateway endpoints provide private access to S3 without traversing the internet.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Attach an internet gateway to the VPC and add a route to the S3 prefix list in the private subnet route table.
Why it's wrong here
This would route traffic through the internet gateway, which is not private.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that a NAT gateway is required for private subnet outbound traffic, but for AWS services like S3, a gateway VPC endpoint provides private connectivity without internet egress.
Detailed technical explanation
How to think about this question
Gateway VPC endpoints use prefix lists and route table entries to direct traffic to S3 or DynamoDB without requiring a NAT or internet gateway. The endpoint is horizontally scaled, redundant, and uses the AWS global network, ensuring low latency and high availability. In real-world scenarios, this is critical for compliance with data sovereignty or internal security policies that prohibit internet-bound traffic for sensitive workloads.
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.
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
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
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Network Security, Compliance and Governance — study guide chapter
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Security, Compliance and Governance — This question tests Network Security, Compliance and Governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a gateway VPC endpoint for S3 and add a route to the endpoint in the private subnet route table. — A gateway VPC endpoint for S3 allows instances in a private subnet to access S3 privately using AWS's internal network, without traversing the internet. By adding a route to the endpoint's prefix list in the private subnet route table, traffic destined for S3 is directed through the endpoint, which uses AWS PrivateLink to provide highly available, redundant connectivity.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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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