Quick Answer
The correct answer is a VPC Gateway Endpoint, as it enables private connectivity between a VPC and S3 without traversing the internet. A Gateway Endpoint uses AWS’s internal network to route traffic to S3 via the prefix list in the route table, ensuring data never leaves the AWS backbone. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this concept tests your understanding of how to isolate S3 access within a VPC, often appearing in scenarios that contrast it with NAT Gateways, Internet Gateways, or VPNs—common traps where candidates mistakenly choose a NAT Gateway for outbound internet or a VPN for hybrid connectivity. Remember that S3 and DynamoDB are the only services supporting Gateway Endpoints, not Interface Endpoints. Memory tip: think “Gateway for S3, Interface for the rest”—if the service is S3, the endpoint type is Gateway.
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 wants to allow its VPC to access an S3 bucket securely without traversing the internet. Which AWS resource enables private connectivity between a VPC and S3?
Internet Gateway
Why wrong: Internet Gateway exposes the VPC to the internet.
AWS Site-to-Site VPN
Why wrong: VPN is for on-premises connectivity to VPC.
VPC Gateway Endpoint
VPC Gateway Endpoint provides private, secure access to S3.
NAT Gateway
Why wrong: NAT Gateway enables outbound internet access, but S3 access would still traverse the internet.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
VPC Gateway Endpoint
Option C is correct because a VPC Gateway Endpoint provides private access to S3 without using the internet. Option A is wrong because NAT Gateway is for outbound internet access, not for S3 access. Option B is wrong because Internet Gateway allows internet traffic, not private access. Option D is wrong because a VPN connection is for on-premises connectivity, not for S3 access.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
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.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Network Design — This question tests Network Design — Static NAT maps one inside address to one outside address..
The correct answer is: VPC Gateway Endpoint — Option C is correct because a VPC Gateway Endpoint provides private access to S3 without using the internet. Option A is wrong because NAT Gateway is for outbound internet access, not for S3 access. Option B is wrong because Internet Gateway allows internet traffic, not private access. Option D is wrong because a VPN connection is for on-premises connectivity, not for S3 access.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 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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