ANS-C01 Network Design Practice Question
A company has a VPC with a public subnet and a private subnet. The private subnet needs to access an S3 bucket for backups. Which TWO actions are required to provide private connectivity to S3 without using a NAT Gateway?
⚠ Common exam trap
It's easy for candidates to confuse VPC Gateway Endpoints with VPC Interface Endpoints, assuming both are equally valid for private S3 access, but the question specifically requires two actions that do not use a NAT Gateway, and the correct pair (Gateway Endpoint + route) is the only combination that meets the criteria without additional costs or complexity.
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 S3.
A VPC Gateway Endpoint provides private connectivity to S3 without traversing the internet or requiring a NAT Gateway. It uses AWS’s internal network to route traffic from the private subnet to S3, ensuring data never leaves the AWS backbone. This is the most cost-effective and secure method for private S3 access within a VPC.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a NAT Gateway in the public subnet.
Why it's wrong here
NAT Gateway is not required for S3 access with Gateway Endpoint.
- ✓
Create a VPC Gateway Endpoint for S3.
Why this is correct
Gateway Endpoint provides private S3 access.
- ✓
Add a route for the S3 prefix list in the private subnet route table pointing to the gateway endpoint.
Why this is correct
Route directs S3 traffic to the endpoint.
- ✗
Create a VPC Interface Endpoint for S3.
Why it's wrong here
Interface Endpoint is not supported for S3.
- ✗
Create a VPC Peering connection to an S3 VPC.
Why it's wrong here
VPC Peering is not required.
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 |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.