The correct answer is that the network interface is attached to a virtual machine that is not accessible from the internet. This is true because the PowerShell output for the Azure network interface public IP association shows an empty PublicIpAddress field, meaning no public IP resource is linked to the NIC, and there are no application security groups or load balancer backend pools providing external routing. In the context of the Microsoft Azure Security Engineer Associate AZ-500 exam, this scenario tests your ability to read Azure CLI or PowerShell output to verify network isolation, a common task when auditing virtual machine security posture. A frequent trap is assuming a NIC in a subnet named "web" automatically has internet access, but without a public IP or load balancer, the VM remains private. Memory tip: No public IP equals no internet path—think of it as a locked door with no keyhole.
AZ-500 Secure networking Practice Question
This AZ-500 practice question tests your understanding of secure networking. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The network interface is attached to a virtual machine that is not accessible from the internet.
The output shows an empty PublicIpAddress field and no application security groups or load balancer pools. The NIC is in subnet 'web' with private IP 10.0.1.4. It is not associated with a public IP.
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.
✗
The network interface is part of an availability set.
Why it's wrong here
The output does not show availability set information.
✗
The network interface is associated with a public IP address.
Why it's wrong here
The PublicIpAddress field is empty, indicating no public IP.
✗
The network interface is configured with application security groups.
Why it's wrong here
The ApplicationSecurityGroups field is empty.
✓
The network interface is attached to a virtual machine that is not accessible from the internet.
Why this is correct
Without a public IP, the VM is not directly reachable from the internet unless behind a load balancer.
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.
Trap categories for this question
Command / output trap
The output does not show availability set information.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-500 question in full detail.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
Secure networking — This question tests Secure networking — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: The network interface is attached to a virtual machine that is not accessible from the internet. — The output shows an empty PublicIpAddress field and no application security groups or load balancer pools. The NIC is in subnet 'web' with private IP 10.0.1.4. It is not associated with a public IP.
What should I do if I get this AZ-500 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 AZ-500 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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