The correct answer is that you must create a firewall policy with a TLS inspection rule and associate it with the Azure Firewall, and you must also upload a root CA certificate to the Azure Firewall for TLS inspection. This is required because Azure Firewall Premium acts as a trusted intermediary, decrypting outbound HTTPS traffic to inspect it for threats, then re-encrypting it using the uploaded root CA certificate to maintain trust with the client applications. On the AZ-500 exam, this question tests your understanding of the explicit configuration steps for TLS inspection, often trapping candidates who mistakenly think disabling SNAT or custom DNS is necessary. A common memory tip is "Cert then Policy": you must first upload the root CA certificate to establish the chain of trust, then create and associate the firewall policy with the TLS inspection rule to apply it to the subnet. Remember, TLS inspection is not enabled by default—it requires both the certificate and the policy to be explicitly configured.
AZ-500 Secure networking Practice Question
This AZ-500 practice question tests your understanding of secure networking. 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.
You are a security engineer for a large enterprise. The company uses Azure Firewall Premium to inspect traffic. You need to enable TLS inspection for outbound HTTPS traffic from a subnet containing line-of-business applications. Which TWO configurations are required to accomplish this? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Upload a trusted root certificate authority (CA) certificate to Azure Firewall.
Option A is correct: A root CA certificate must be uploaded to Azure Firewall for TLS inspection. Option B is correct: A firewall policy with TLS inspection rule must be created and associated. Option C is incorrect because TLS inspection does not require disabling SNAT. Option D is incorrect because Azure Firewall does not support custom DNS for TLS inspection configuration. Option E is incorrect because the feature is not disabled by default; it requires explicit configuration.
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.
✗
Enable the TLS inspection feature in the Azure Firewall configuration.
Why it's wrong here
TLS inspection is not a toggle; it requires specific policy configuration.
✓
Upload a trusted root certificate authority (CA) certificate to Azure Firewall.
Why this is correct
Required for Azure Firewall to re-encrypt traffic after inspection.
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.
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: Upload a trusted root certificate authority (CA) certificate to Azure Firewall. — Option A is correct: A root CA certificate must be uploaded to Azure Firewall for TLS inspection. Option B is correct: A firewall policy with TLS inspection rule must be created and associated. Option C is incorrect because TLS inspection does not require disabling SNAT. Option D is incorrect because Azure Firewall does not support custom DNS for TLS inspection configuration. Option E is incorrect because the feature is not disabled by default; it requires explicit configuration.
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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