- A
NAT Gateway
Why wrong: NAT gateway is for outbound internet access.
- B
AWS Site-to-Site VPN
Why wrong: VPN connects on-premises to VPC.
- C
Internet Gateway
Why wrong: This would allow internet access, not private connectivity to S3.
- D
VPC Endpoint (Gateway type) for S3
This provides private connectivity to S3.
Question 1,543 of 1,748
SCS-C02 Infrastructure Security Practice Question
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?
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
✓
VPC Endpoint (Gateway type) for S3
A VPC Endpoint (Gateway type) for S3 allows EC2 instances within a VPC to access S3 buckets privately using AWS's internal network, without traversing the internet. This is achieved by adding an endpoint route in the VPC route table that directs S3 traffic to the endpoint, which uses AWS's private infrastructure. It eliminates the need for an internet gateway, NAT gateway, or VPN connection, ensuring the instance remains isolated from the public internet.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
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
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Gateway Endpoints with Interface Endpoints (powered by AWS PrivateLink) and incorrectly assume a NAT Gateway is required for private subnet access, but Gateway Endpoints are specifically designed for S3 and DynamoDB and do not require any additional infrastructure.
Detailed technical explanation
How to think about this question
Gateway VPC Endpoints for S3 use prefix lists and route table entries to direct S3 traffic (over HTTPS) through AWS's private network, bypassing the internet. Under the hood, the endpoint is a horizontally scaled, redundant AWS service that uses the S3 public endpoint but resolves via private IPs within the VPC. A real-world scenario is a data processing pipeline where EC2 instances in a private subnet write logs to S3 without needing a NAT Gateway, reducing cost and attack surface.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
Infrastructure Security — This question tests Infrastructure Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: VPC Endpoint (Gateway type) for S3 — A VPC Endpoint (Gateway type) for S3 allows EC2 instances within a VPC to access S3 buckets privately using AWS's internal network, without traversing the internet. This is achieved by adding an endpoint route in the VPC route table that directs S3 traffic to the endpoint, which uses AWS's private infrastructure. It eliminates the need for an internet gateway, NAT gateway, or VPN connection, ensuring the instance remains isolated from the public internet.
What should I do if I get this SCS-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 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.
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