This SOA-C02 practice question tests your understanding of networking and content delivery. 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 has a VPC with public and private subnets. An EC2 instance in a private subnet needs to download software patches from the internet. Which component should be used to provide internet access to the instance?
NAT Gateway in a public subnet
NAT Gateway enables outbound internet connectivity for private subnets.
AWS Site-to-Site VPN
Why wrong: VPN connects to on-premises, not the internet.
Internet Gateway attached to the VPC
Why wrong: Internet Gateway is for public subnets; private subnets need a NAT device.
VPC Endpoint for Amazon S3
Why wrong: VPC Endpoint provides private access to S3, not general 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
NAT Gateway in a public subnet
Option B is correct because a NAT Gateway allows instances in private subnets to initiate outbound traffic to the internet while preventing inbound traffic. Option A is incorrect because an Internet Gateway is used for public subnets, not private. Option C is incorrect because a VPC Endpoint is for accessing AWS services privately. Option D is incorrect because a VPN connection is for on-premises connectivity, not internet access.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
NAT Gateway in a public subnet
AWS Site-to-Site VPN
Why it's wrong here
VPN connects to on-premises, not the internet.
Internet Gateway attached to the VPC
VPC Endpoint for Amazon S3
Why it's wrong here
VPC Endpoint provides private access to S3, not general internet.
Common exam traps
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related SOA-C02 subnetting questions on CIDR, address ranges, and subnet selection.
Networking and Content Delivery — study guide chapter
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FAQ
Networking and Content Delivery — This question tests Networking and Content Delivery — CIDR notation defines the prefix length..
The correct answer is: NAT Gateway in a public subnet — Option B is correct because a NAT Gateway allows instances in private subnets to initiate outbound traffic to the internet while preventing inbound traffic. Option A is incorrect because an Internet Gateway is used for public subnets, not private. Option C is incorrect because a VPC Endpoint is for accessing AWS services privately. Option D is incorrect because a VPN connection is for on-premises connectivity, not internet access.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related SOA-C02 subnetting questions on CIDR, address ranges, and subnet selection.
CIDR notation defines the prefix length.
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Last reviewed: Jun 20, 2026
This SOA-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 SOA-C02 exam.
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