The answer is Azure DDoS Protection and Azure Firewall. Azure DDoS Protection Standard is the primary service for defending virtual networks against volumetric DDoS attacks at the network layer, leveraging global monitoring to absorb and scrub malicious traffic before it reaches your resources. Azure Firewall complements this by filtering inbound traffic at the network layer based on rules, though its DDoS mitigation is limited compared to the dedicated protection service. On the Microsoft Cybersecurity Architect exam, this question tests your ability to distinguish between network-layer defenses and application-layer tools like WAF, with a common trap being to select NSGs—which filter traffic but cannot mitigate DDoS scale—or Traffic Manager, which only handles load balancing. Remember the memory tip: "DDoS Protection stops the flood, Firewall filters the mud," emphasizing that DDoS Protection handles volumetric attacks while Firewall enforces granular network-layer rules.
SC-100 Design security solutions for infrastructure Practice Question
This SC-100 practice question tests your understanding of design security solutions for infrastructure. 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.
Which TWO Azure services can be used to protect a virtual network from inbound DDoS attacks at the network layer?
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 Standard
Azure DDoS Protection Standard provides defense against volumetric DDoS attacks. Azure Firewall can filter traffic at the network layer, but its DDoS capabilities are limited; Azure DDoS Protection is the primary service. WAF is for application layer. NSGs can filter traffic but not mitigate DDoS. Traffic Manager is for load balancing.
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 DDoS Protection Standard
Why this is correct
Correct: Specifically designed for DDoS mitigation at network layer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Web Application Firewall (WAF)
Why it's wrong here
Incorrect: WAF protects against application-layer attacks, not network-layer DDoS.
✗
Azure Traffic Manager
Why it's wrong here
Incorrect: Traffic Manager distributes traffic, does not protect against DDoS.
✗
Network Security Groups (NSGs)
Why it's wrong here
Incorrect: NSGs filter traffic but cannot mitigate DDoS attacks.
✓
Azure Firewall
Why this is correct
Correct: Can filter traffic and integrate with DDoS protection.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-100 question in full detail.
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Design security solutions for infrastructure — This question tests Design security solutions for infrastructure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure DDoS Protection Standard — Azure DDoS Protection Standard provides defense against volumetric DDoS attacks. Azure Firewall can filter traffic at the network layer, but its DDoS capabilities are limited; Azure DDoS Protection is the primary service. WAF is for application layer. NSGs can filter traffic but not mitigate DDoS. Traffic Manager is for load balancing.
What should I do if I get this SC-100 question wrong?
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SC-100 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-100 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.