- A
Azure Firewall
Why wrong: Azure Firewall provides network and application layer filtering, but it is not a dedicated DDoS protection service and cannot handle the scale of large DDoS attacks.
- B
Azure DDoS Protection
This service offers always-on monitoring and automatic mitigation of DDoS attacks, protecting applications deployed in Azure.
- C
Microsoft Defender for Cloud
Why wrong: Microsoft Defender for Cloud (now part of Microsoft Defender for Cloud) provides security posture management and threat detection, but does not include dedicated DDoS mitigation.
- D
Azure Application Gateway with Web Application Firewall (WAF)
Why wrong: While WAF protects against common web vulnerabilities, it does not mitigate large-scale DDoS attacks; that requires Azure DDoS Protection.
Quick Answer
The answer is Azure DDoS Protection, the service specifically designed to defend Azure resources against large-scale distributed denial-of-service attacks from multiple sources. This service works by leveraging Microsoft’s global network capacity to absorb and mitigate multi-gigabit traffic floods at layers 3 and 4, with always-on traffic monitoring and adaptive tuning that automatically adjusts protections as attack patterns evolve. On the SC-900 exam, this question tests your understanding of Azure’s native security services versus third-party or general-purpose tools; a common trap is confusing Azure Firewall or Network Security Groups with DDoS mitigation, but remember that only Azure DDoS Protection is purpose-built for volumetric attack absorption at scale. For a quick memory tip, think “DDoS = Defense at the Doorstep of the data center,” where Azure’s global backbone acts as the shield, and the service name itself—DDoS Protection—is the only answer that directly matches the question’s intent.
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. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 runs a web application in Azure that is publicly accessible. They want to protect it against large-scale distributed denial-of-service (DDoS) attacks from multiple sources. Which Azure service is specifically designed for this purpose?
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
Azure DDoS Protection
Azure DDoS Protection is specifically designed to safeguard Azure resources against large-scale distributed denial-of-service (DDoS) attacks. It leverages the global scale of Microsoft's network to absorb and mitigate multi-gigabit attacks, providing always-on traffic monitoring and adaptive tuning. This service is the only option among the choices that is purpose-built for DDoS mitigation at the network and transport layers (L3/L4), and it also offers application-layer (L7) protection when combined with Application Gateway WAF.
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.
- ✗
Azure Firewall
Why it's wrong here
Azure Firewall provides network and application layer filtering, but it is not a dedicated DDoS protection service and cannot handle the scale of large DDoS attacks.
- ✓
Azure DDoS Protection
Why this is correct
This service offers always-on monitoring and automatic mitigation of DDoS attacks, protecting applications deployed in Azure.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Microsoft Defender for Cloud
Why it's wrong here
Microsoft Defender for Cloud (now part of Microsoft Defender for Cloud) provides security posture management and threat detection, but does not include dedicated DDoS mitigation.
- ✗
Azure Application Gateway with Web Application Firewall (WAF)
Why it's wrong here
While WAF protects against common web vulnerabilities, it does not mitigate large-scale DDoS attacks; that requires Azure DDoS Protection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Firewall or Application Gateway WAF as DDoS solutions, but those services handle different layers of defense—Azure Firewall for network filtering and WAF for application-layer attacks—whereas only Azure DDoS Protection is designed to absorb and mitigate large-scale volumetric attacks from multiple sources.
Detailed technical explanation
How to think about this question
Azure DDoS Protection uses adaptive tuning based on your application's traffic patterns to establish baseline thresholds, automatically adjusting mitigation triggers to avoid false positives. It integrates with Azure Monitor and provides real-time telemetry via metrics and diagnostic logs, allowing you to see attack traffic and mitigation actions. In a real-world scenario, a volumetric SYN flood targeting a public web app would be detected and scrubbed at the Azure network edge before reaching the application, while Azure Firewall would only block based on static rules and could be overwhelmed.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Describe the capabilities of Microsoft security solutions — study guide chapter
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FAQ
Questions learners often ask
What does this SC-900 question test?
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: Azure DDoS Protection — Azure DDoS Protection is specifically designed to safeguard Azure resources against large-scale distributed denial-of-service (DDoS) attacks. It leverages the global scale of Microsoft's network to absorb and mitigate multi-gigabit attacks, providing always-on traffic monitoring and adaptive tuning. This service is the only option among the choices that is purpose-built for DDoS mitigation at the network and transport layers (L3/L4), and it also offers application-layer (L7) protection when combined with Application Gateway WAF.
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.
About these practice questions
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Last reviewed: Jun 11, 2026
This SC-900 practice question is part of Courseiva's free Microsoft 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 SC-900 exam.
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