SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
This SC-900 practice question tests your understanding of describe the capabilities of microsoft security solutions. 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.
Refer to the exhibit. You are reviewing an ARM template for an Azure resource. Assuming the resource is a Key Vault, what is the effect of the networkAcls configuration?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The Key Vault is accessible only from the 10.0.0.0/24 subnet.
The networkAcls configuration in the ARM template defines IP firewall rules for the Key Vault. By specifying a defaultAction of 'Deny' and a single ipRule with a value of '10.0.0.0/24', the Key Vault is configured to allow traffic only from the 10.0.0.0/24 subnet. All other traffic, including traffic from other networks and Azure services, is denied by default.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 Key Vault is accessible from any network.
Why it's wrong here
Incorrect: PublicNetworkAccess is Disabled and defaultAction is Deny.
✓
The Key Vault is accessible only from the 10.0.0.0/24 subnet.
Why this is correct
Correct: The IP rule allows that subnet, and default action denies all others.
Related concept
Read the scenario before looking for a memorised answer.
✗
The Key Vault is accessible from all Azure services.
Why it's wrong here
Incorrect: Only the specified IP range is allowed.
✗
The Key Vault is not accessible from any network.
Why it's wrong here
Incorrect: The IP rule allows traffic from 10.0.0.0/24.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume a single ipRule with a subnet means the Key Vault is accessible from all Azure services or from any network, but the defaultAction of 'Deny' explicitly blocks all traffic except the allowed IP range, and the absence of a bypass setting prevents Azure services from accessing the vault.
Detailed technical explanation
How to think about this question
The networkAcls object uses a defaultAction of 'Deny' combined with ipRules to create a whitelist-based firewall. The bypass parameter (not shown in the exhibit) can be set to 'AzureServices' to allow trusted Azure services to bypass the firewall, but in this configuration, it is absent or set to 'None', meaning only the specified IP range is allowed. This is a common pattern for securing Key Vaults in production to restrict access to a specific virtual network or on-premises subnet.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Visual reference
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-900 question in full detail.
Describe the capabilities of Microsoft security solutions — This question tests Describe the capabilities of Microsoft security solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Key Vault is accessible only from the 10.0.0.0/24 subnet. — The networkAcls configuration in the ARM template defines IP firewall rules for the Key Vault. By specifying a defaultAction of 'Deny' and a single ipRule with a value of '10.0.0.0/24', the Key Vault is configured to allow traffic only from the 10.0.0.0/24 subnet. All other traffic, including traffic from other networks and Azure services, is denied by default.
What should I do if I get this SC-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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