- A
Configure a proxy server in the public subnet to forward requests to S3.
Why wrong: Proxy adds management overhead and latency; not best practice.
- B
Set up an AWS Direct Connect connection to S3.
Why wrong: Direct Connect is expensive and unnecessary for this use case.
- C
Create a NAT gateway in the public subnet and route traffic through it.
Why wrong: NAT gateway incurs costs and uses internet; not most secure or cost-effective.
- D
Create an S3 Gateway Endpoint in the VPC and add a route to it.
Gateway Endpoint provides private, free access to S3 within same Region.
Question 238 of 1,705
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 deploying a new application in a VPC with public and private subnets. The application needs to access an S3 bucket in the same AWS Region. Which configuration provides the MOST secure and cost-effective connectivity?
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 an S3 Gateway Endpoint in the VPC and add a route to it.
An S3 Gateway Endpoint allows private subnet resources to access S3 over the AWS network without traversing the internet, eliminating the need for a NAT gateway or proxy. This provides the most secure connectivity (no public exposure) and is cost-effective because there are no hourly or data processing charges for the endpoint itself, only standard S3 data transfer costs.
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.
- ✗
Configure a proxy server in the public subnet to forward requests to S3.
Why it's wrong here
Proxy adds management overhead and latency; not best practice.
- ✗
Set up an AWS Direct Connect connection to S3.
Why it's wrong here
Direct Connect is expensive and unnecessary for this use case.
- ✗
Create a NAT gateway in the public subnet and route traffic through it.
- ✓
Create an S3 Gateway Endpoint in the VPC and add a route to it.
Why this is correct
Gateway Endpoint provides private, free access to S3 within same Region.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The ANS-C01 exam often tests the misconception that a NAT gateway is required for private subnet internet access, but for AWS services like S3 and DynamoDB, gateway endpoints provide a more secure and cost-effective alternative without internet egress.
Detailed technical explanation
How to think about this question
An S3 Gateway Endpoint uses a prefix list in the VPC route table to direct traffic destined for S3 (via the S3 service-specific prefix) through the AWS private network, bypassing the internet gateway. Under the hood, the endpoint leverages AWS PrivateLink but for gateway endpoints, it uses route table entries rather than elastic network interfaces, meaning there is no additional per-hour cost. In real-world scenarios, this is ideal for applications like batch processing or log aggregation that frequently read/write to S3 from private subnets, as it avoids NAT gateway data processing fees that can become substantial at scale.
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.
Visual reference
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create an S3 Gateway Endpoint in the VPC and add a route to it. — An S3 Gateway Endpoint allows private subnet resources to access S3 over the AWS network without traversing the internet, eliminating the need for a NAT gateway or proxy. This provides the most secure connectivity (no public exposure) and is cost-effective because there are no hourly or data processing charges for the endpoint itself, only standard S3 data transfer costs.
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: 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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