AIF-C01 Practice Question: Ensure that model inference endpoints in…
This AIF-C01 practice question tests your understanding of ensure that model inference endpoints in…. 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 needs to ensure that model inference endpoints in SageMaker are only accessible from a private subnet in their VPC, and no traffic goes over the public internet. Which network configuration should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a VPC interface endpoint for SageMaker and disable public access
A VPC-only endpoint (interface endpoint) or private endpoint without public internet access ensures traffic stays within the VPC.
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.
✗
Create a public endpoint and restrict access using IAM policies
Why it's wrong here
Public endpoint still uses internet; IAM does not prevent internet exposure.
✗
Use AWS PrivateLink for the endpoint, but keep public endpoint enabled
Why it's wrong here
PrivateLink provides private connectivity, but leaving public endpoint enabled allows internet traffic.
✓
Use a VPC interface endpoint for SageMaker and disable public access
Why this is correct
An interface endpoint connects SageMaker to the VPC privately, and disabling public access ensures no internet traffic.
Deploy the endpoint in a public subnet with a security group blocking all inbound traffic
Why it's wrong here
Public subnet implies internet gateway; security group cannot block outbound internet entirely.
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.
The correct answer is: Use a VPC interface endpoint for SageMaker and disable public access — A VPC-only endpoint (interface endpoint) or private endpoint without public internet access ensures traffic stays within the VPC.
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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Question Discussion
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