The answer is to create a VPC Gateway Endpoint for S3. This is correct because a Gateway Endpoint provides a private, highly available route from your VPC to S3 using the AWS network, bypassing the public internet entirely. Since the EC2 instance is in a private subnet without internet access, a Gateway Endpoint is the only native AWS service that allows direct, secure access to S3 without requiring a NAT Gateway, Internet Gateway, or VPN connection. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of network isolation for SAP workloads—a common trap is choosing a NAT Gateway, which is unnecessary and adds cost for S3 access. Remember the key distinction: Gateway Endpoints are free and use the AWS backbone, while NAT Gateways are for general internet egress. A simple memory tip: "Gateway for S3, NAT for the sea"—meaning a Gateway Endpoint is for S3, while a NAT Gateway is for reaching the open internet.
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. 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.
An SAP system administrator needs to ensure that an EC2 instance running SAP can access an S3 bucket containing installation media. The instance is in a private subnet without internet access. What is the recommended way to provide access to S3?
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 Gateway Endpoint for S3.
A VPC Gateway Endpoint for S3 allows instances in a private subnet to access S3 without internet access. NAT Gateway is for internet access, Direct Connect is for on-premises connectivity, and VPN is for site-to-site.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Set up a VPN connection to S3.
Why it's wrong here
VPN is not necessary; gateway endpoint is simpler.
NATGateway allows outbound internet access but is not needed for S3 via gateway endpoint.
✗
Use AWS Direct Connect to connect to S3.
Why it's wrong here
Direct Connect is for on-premises, not for EC2 in the same region.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
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
How to think about this question
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.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
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
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.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PAS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
Technology — This question tests Technology — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Create a VPC Gateway Endpoint for S3. — A VPC Gateway Endpoint for S3 allows instances in a private subnet to access S3 without internet access. NAT Gateway is for internet access, Direct Connect is for on-premises connectivity, and VPN is for site-to-site.
What should I do if I get this PAS-C01 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PAS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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