- A
Attach an S3 bucket policy that denies access unless the source IP is the public IP address of the Direct Connect VIF.
Why wrong: Direct Connect VIFs use private IP addresses, not public IPs; the source IP would be from the on-premises network, not the VIF.
- B
Create a VPC endpoint for S3 with a VPC endpoint policy that allows access only from the VPC, and configure the VPC route table to route S3 traffic through the Direct Connect VIF.
This ensures that S3 traffic must traverse the VPC endpoint, and the route table forces traffic through the Direct Connect VIF, restricting access to that path.
- C
Create a network ACL that allows S3 traffic only from the Direct Connect CIDR block and associate it with the VPC subnet connected to the VIF.
Why wrong: Network ACLs are stateless and not designed to enforce traffic source path; they also do not directly restrict S3 bucket access.
- D
Configure the Direct Connect VIF with a public IP address and use an S3 bucket policy that allows access only from that IP address.
Why wrong: Direct Connect VIFs do not have public IP addresses; they use private IPs or BGP prefixes.
ANS-C01 VPC Endpoint for S3 Practice Question
This ANS-C01 practice question tests your understanding of network security, compliance and governance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: vPC Endpoint for S3. 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 wants to restrict access to an Amazon S3 bucket so that only traffic from a specific AWS Direct Connect virtual interface (VIF) can access it. Which combination of steps should the company take?
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 endpoint for S3 with a VPC endpoint policy that allows access only from the VPC, and configure the VPC route table to route S3 traffic through the Direct Connect VIF.
The correct answer is option B. To restrict access to an S3 bucket to only traffic from a specific Direct Connect VIF, you can create a VPC endpoint for S3 and attach a VPC endpoint policy that allows access only from the VPC. Then, configure the VPC route table to route traffic destined for S3 through the Direct Connect VIF, ensuring that only traffic coming through that VIF can reach the endpoint. Option A is incorrect because the Direct Connect VIF does not have a public IP address; it uses private IPs. Option C is incorrect because network ACLs are stateless and cannot enforce path-specific restrictions; also they operate at the subnet level, not for specific services like S3. Option D is incorrect because Direct Connect VIFs do not have public IP addresses; they use private IPs and traffic goes through private virtual interfaces.
Key principle: VPC Endpoint for S3
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Attach an S3 bucket policy that denies access unless the source IP is the public IP address of the Direct Connect VIF.
Why it's wrong here
Direct Connect VIFs use private IP addresses, not public IPs; the source IP would be from the on-premises network, not the VIF.
- ✓
Create a VPC endpoint for S3 with a VPC endpoint policy that allows access only from the VPC, and configure the VPC route table to route S3 traffic through the Direct Connect VIF.
Why this is correct
This ensures that S3 traffic must traverse the VPC endpoint, and the route table forces traffic through the Direct Connect VIF, restricting access to that path.
Related concept
VPC Endpoint for S3
- ✗
Create a network ACL that allows S3 traffic only from the Direct Connect CIDR block and associate it with the VPC subnet connected to the VIF.
Why it's wrong here
Network ACLs are stateless and not designed to enforce traffic source path; they also do not directly restrict S3 bucket access.
- ✗
Configure the Direct Connect VIF with a public IP address and use an S3 bucket policy that allows access only from that IP address.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common trap is to think that a bucket policy with an IP address condition can restrict traffic to a Direct Connect VIF, but Direct Connect VIFs use private IPs, not public IPs. Another trap is using network ACLs, which are stateless and cannot restrict based on the source being a specific VIF.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- VPC Endpoint for S3
- VPC Endpoint Policy
- Direct Connect Virtual Interface
- Route Table
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
VPC Endpoint for S3
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.
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
Got this wrong? Here's your next step.
Review vPC Endpoint for S3, then practise related ANS-C01 questions on the same topic to reinforce the concept.
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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 — VPC Endpoint for S3.
What is the correct answer to this question?
The correct answer is: Create a VPC endpoint for S3 with a VPC endpoint policy that allows access only from the VPC, and configure the VPC route table to route S3 traffic through the Direct Connect VIF. — The correct answer is option B. To restrict access to an S3 bucket to only traffic from a specific Direct Connect VIF, you can create a VPC endpoint for S3 and attach a VPC endpoint policy that allows access only from the VPC. Then, configure the VPC route table to route traffic destined for S3 through the Direct Connect VIF, ensuring that only traffic coming through that VIF can reach the endpoint. Option A is incorrect because the Direct Connect VIF does not have a public IP address; it uses private IPs. Option C is incorrect because network ACLs are stateless and cannot enforce path-specific restrictions; also they operate at the subnet level, not for specific services like S3. Option D is incorrect because Direct Connect VIFs do not have public IP addresses; they use private IPs and traffic goes through private virtual interfaces.
What should I do if I get this ANS-C01 question wrong?
Review vPC Endpoint for S3, then practise related ANS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
VPC Endpoint for S3
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Last reviewed: Jun 20, 2026
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