- A
Use S3 Transfer Acceleration and access the bucket via the public endpoint
Why wrong: Transfer Acceleration is designed for long distances and adds no benefit for same-region access; it also requires public internet access.
- B
Create a VPC Gateway Endpoint for Amazon S3 and update the route table for the private subnet
A Gateway Endpoint provides private connectivity to S3 without leaving the AWS network, minimizing latency and avoiding NAT gateway costs.
- C
Attach an Internet Gateway to the VPC and route the private subnet traffic through a NAT instance
Why wrong: An Internet Gateway alone does not provide private subnet access; a NAT instance would still be needed and adds latency.
- D
Set up a NAT gateway in the public subnet and route traffic to the S3 bucket through it
Why wrong: A NAT gateway adds latency and cost, and is not the lowest-latency path to S3.
ANS-C01 Network Design Practice Question
This ANS-C01 practice question tests your understanding of network design. 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 is running a latency-sensitive application in a VPC with a public subnet and a private subnet. The application in the private subnet needs to access an Amazon S3 bucket in the same region. The company wants to minimize latency and avoid using a NAT gateway. Which solution meets these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 VPC Gateway Endpoint for Amazon S3 and update the route table for the private subnet
A VPC Gateway Endpoint for Amazon S3 allows instances in a private subnet to access S3 without traversing the internet or requiring a NAT gateway. This minimizes latency by routing traffic over the AWS internal network, and it avoids the cost and complexity of NAT devices. The route table for the private subnet must be updated with a route pointing to the gateway endpoint for the S3 prefix list.
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.
- ✗
Use S3 Transfer Acceleration and access the bucket via the public endpoint
Why it's wrong here
Transfer Acceleration is designed for long distances and adds no benefit for same-region access; it also requires public internet access.
- ✓
Create a VPC Gateway Endpoint for Amazon S3 and update the route table for the private subnet
Why this is correct
A Gateway Endpoint provides private connectivity to S3 without leaving the AWS network, minimizing latency and avoiding NAT gateway costs.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Attach an Internet Gateway to the VPC and route the private subnet traffic through a NAT instance
- ✗
Set up a NAT gateway in the public subnet and route traffic to the S3 bucket through it
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume S3 Transfer Acceleration is always faster, but it is designed for cross-region or long-distance transfers and actually adds latency for same-region traffic due to additional routing and edge location processing.
Detailed technical explanation
How to think about this question
A VPC Gateway Endpoint uses AWS PrivateLink to route S3 traffic through the AWS network backbone, bypassing the internet entirely. The endpoint is represented as a prefix list in the route table, and traffic to S3 is resolved via DNS to private IP addresses within the VPC. This approach ensures sub-millisecond latency for same-region access and avoids data transfer costs associated with NAT gateways or internet gateways.
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 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a VPC Gateway Endpoint for Amazon S3 and update the route table for the private subnet — A VPC Gateway Endpoint for Amazon S3 allows instances in a private subnet to access S3 without traversing the internet or requiring a NAT gateway. This minimizes latency by routing traffic over the AWS internal network, and it avoids the cost and complexity of NAT devices. The route table for the private subnet must be updated with a route pointing to the gateway endpoint for the S3 prefix list.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 24, 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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