Quick Answer
The answer is a VPC Endpoint of the Gateway type for S3. This is correct because a Gateway VPC endpoint allows private connectivity between your VPC and S3 without requiring an internet gateway, NAT device, or VPN connection, keeping all traffic within the AWS network. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your understanding of how to achieve private AWS service access for S3 and DynamoDB, specifically distinguishing Gateway endpoints from Interface endpoints. A common trap is confusing Gateway endpoints (used only for S3 and DynamoDB) with Interface endpoints (used for other services like KMS or CloudWatch), or assuming a NAT Gateway provides private access when it actually only enables outbound internet traffic. Remember the memory tip: "Gateway for the big two—S3 and DynamoDB"—if the service is S3 or DynamoDB, always think Gateway endpoint first.
This SCS-C02 practice question tests your understanding of infrastructure security. 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 an EC2 instance to access an S3 bucket without exposing the instance to the internet. Which AWS service should be used to achieve this?
NAT Gateway
Why wrong: NAT gateway is for outbound internet access.
AWS Site-to-Site VPN
Why wrong: VPN connects on-premises to VPC.
Internet Gateway
Why wrong: This would allow internet access, not private connectivity to S3.
VPC Endpoint (Gateway type) for S3
This provides private connectivity to S3.
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 Endpoint (Gateway type) for S3
Option B is correct. A VPC endpoint for S3 allows private connectivity between the VPC and S3 without internet access. Option A (Internet Gateway) would expose the instance. Option C (NAT Gateway) is for outbound internet. Option D (VPN) is for on-premises connectivity.
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.
NAT Gateway
AWS Site-to-Site VPN
Why it's wrong here
VPN connects on-premises to VPC.
Internet Gateway
Why it's wrong here
This would allow internet access, not private connectivity to S3.
VPC Endpoint (Gateway type) for S3
Why this is correct
This provides private connectivity to S3.
Related concept
Static NAT maps one inside address to one outside address.
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 SCS-C02 NAT questions on configuration and troubleshooting.
Infrastructure Security — study guide chapter
Learn the concepts, then practise the questions
Infrastructure Security practice questions
Targeted practice on this topic area only
All SCS-C02 questions
1,738 questions across all exam domains
AWS Certified Security Specialty SCS-C02 study guide
Full concept coverage aligned to exam objectives
SCS-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise SCS-C02 questions linked to Threat Detection and Incident Response.
Practise SCS-C02 questions linked to Security Logging and Monitoring.
Practise SCS-C02 questions linked to Identity and Access Management.
Practise SCS-C02 questions linked to Management and Security Governance.
Practise SCS-C02 questions linked to Infrastructure Security.
Practise SCS-C02 questions linked to Data Protection.
Practise SCS-C02 questions linked to SCS-C02 fundamentals.
Practise SCS-C02 questions linked to SCS-C02 scenario.
Practise SCS-C02 questions linked to SCS-C02 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Infrastructure Security — This question tests Infrastructure Security — Static NAT maps one inside address to one outside address..
The correct answer is: VPC Endpoint (Gateway type) for S3 — Option B is correct. A VPC endpoint for S3 allows private connectivity between the VPC and S3 without internet access. Option A (Internet Gateway) would expose the instance. Option C (NAT Gateway) is for outbound internet. Option D (VPN) is for on-premises connectivity.
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 SCS-C02 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company wants to allow an EC2 instance to access a DynamoDB table without traversing the internet. Which AWS feature should be used?
easyWhy D: Option A is correct because VPC Gateway Endpoint for DynamoDB allows private connectivity. Option B is wrong because VPC Peering is for VPC-to-VPC. Option C is wrong because NAT Gateway is for internet access. Option D is wrong because ClassicLink is for EC2-Classic, deprecated.
Last reviewed: Jun 20, 2026
This SCS-C02 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 SCS-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.