ANS-C01 Network Security, Compliance and Governance Practice Question
A company has an AWS Direct Connect connection and wants to ensure that all traffic from its VPC to an S3 bucket in another region stays within the AWS network. How should this be accomplished?
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
✓
Use a NAT gateway in the VPC and route traffic through the Direct Connect public VIF
To access an S3 bucket in another region from a VPC while keeping traffic on the AWS network, you can route traffic through a Direct Connect public virtual interface (VIF). A NAT gateway in the VPC can be used to route traffic from private subnets to the public VIF, which then connects to the S3 public endpoint across the AWS global backbone. This ensures traffic does not traverse the public internet. Option A is incorrect because VPC Gateway Endpoints are regional and can only be used for S3 buckets in the same region. Option B is incorrect because VPC Interface Endpoints for S3 are region-specific and cannot be used to access S3 buckets in another region. Option D is incorrect because VPN connections cannot be established directly to S3 buckets.
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 VPC Gateway Endpoint for S3 in the source VPC
Why it's wrong here
Gateway Endpoints are regional and only work within the same region.
- ✗
Create a VPC Interface Endpoint for S3 in the source VPC
Why it's wrong here
Incorrect. VPC Interface Endpoints for S3 are supported via AWS PrivateLink, but they are region-specific and cannot be used to access S3 buckets in another region.
- ✓
Use a NAT gateway in the VPC and route traffic through the Direct Connect public VIF
Why this is correct
Using a public VIF with Direct Connect allows traffic to S3 in any region via the AWS backbone, keeping it off the public internet.
- ✗
Establish a VPN connection to the S3 bucket
Why it's wrong here
VPN over internet does not guarantee traffic stays on AWS network.
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.