- A
Deploy the endpoint in a private subnet with a VPC endpoint for SageMaker Runtime
This makes the endpoint accessible only via the VPC endpoint, ensuring no public internet access, and HTTPS is used automatically.
- B
Deploy the endpoint in a public subnet and use a security group to restrict source IPs
Why wrong: Even with security group restrictions, the endpoint has a public DNS and is potentially exposed to the internet.
- C
Enable network isolation on the endpoint
Why wrong: Network isolation prevents the endpoint from accessing the internet but does not restrict inbound access; the endpoint remains publicly accessible.
- D
Use an AWS Lambda function to proxy requests and restrict access via IAM
Why wrong: Lambda adds complexity and still requires the endpoint to be accessible; it does not inherently restrict network access.
AIF-C01 Practice Question: Deploying a real-time inference endpoint using…
This AIF-C01 practice question tests your understanding of aif-c01 exam topics. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 is deploying a real-time inference endpoint using Amazon SageMaker. The security team requires that all data sent to the endpoint be encrypted in transit and that the endpoint is only accessible from within the company's VPC. Which configuration should be used?
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
Deploy the endpoint in a private subnet with a VPC endpoint for SageMaker Runtime
SageMaker endpoints can be deployed in a VPC and configured to use a private VPC endpoint (AWS PrivateLink) so that they are accessible only from within the VPC. HTTPS ensures encryption in transit; SageMaker endpoints automatically use HTTPS.
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.
- ✓
Deploy the endpoint in a private subnet with a VPC endpoint for SageMaker Runtime
- ✗
Deploy the endpoint in a public subnet and use a security group to restrict source IPs
Why it's wrong here
Even with security group restrictions, the endpoint has a public DNS and is potentially exposed to the internet.
- ✗
Enable network isolation on the endpoint
Why it's wrong here
Network isolation prevents the endpoint from accessing the internet but does not restrict inbound access; the endpoint remains publicly accessible.
- ✗
Use an AWS Lambda function to proxy requests and restrict access via IAM
Why it's wrong here
Lambda adds complexity and still requires the endpoint to be accessible; it does not inherently restrict network access.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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 AIF-C01 subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Questions learners often ask
What does this AIF-C01 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Deploy the endpoint in a private subnet with a VPC endpoint for SageMaker Runtime — SageMaker endpoints can be deployed in a VPC and configured to use a private VPC endpoint (AWS PrivateLink) so that they are accessible only from within the VPC. HTTPS ensures encryption in transit; SageMaker endpoints automatically use HTTPS.
What should I do if I get this AIF-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 AIF-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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Last reviewed: Jul 4, 2026
This AIF-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 AIF-C01 exam.
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