The correct answer is to enable Azure DDoS Network Protection on the Azure Front Door origin and configure DDoS protection on AFD. This layered defense works because Azure DDoS Network Protection scrubs volumetric traffic at the network layer before it reaches the origin, while AFD’s built-in DDoS mitigation absorbs application-layer attacks at the edge, ensuring minimal latency for legitimate users by keeping traffic processing close to the user. On the AZ-500 exam, this scenario tests your understanding of how to combine Azure-native DDoS services without introducing performance trade-offs; a common trap is assuming rate limiting or caching adjustments alone can handle volumetric attacks, but those only affect application behavior, not network floods. Remember the memory tip: “Edge for speed, origin for depth”—AFD handles the edge with low latency, while DDoS Network Protection provides deep scrubbing at the origin.
AZ-500 Secure networking Practice Question
This AZ-500 practice question tests your understanding of secure networking. 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.
Your organization uses Azure Front Door (AFD) with WAF policy to protect a web application. Recently, a DDoS attack targeted the application endpoint. You need to mitigate the attack while minimizing latency for legitimate users. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Azure DDoS Network Protection on the AFD origin and configure DDoS protection on AFD.
Option C is correct because Azure DDoS Network Protection combined with AFD's DDoS mitigation provides layered defense. Option A is wrong because rate limiting alone does not stop volumetric DDoS. Option B is wrong because moving to App Gateway does not improve latency. Option D is wrong because disabling caching does not mitigate DDoS.
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.
✗
Increase the rate limit threshold in the WAF policy.
Why it's wrong here
Rate limiting may block legitimate users and does not stop large volumetric attacks.
✓
Enable Azure DDoS Network Protection on the AFD origin and configure DDoS protection on AFD.
Why this is correct
DDoS Network Protection and AFD's built-in mitigation work together to absorb attacks.
Related concept
Read the scenario before looking for a memorised answer.
✗
Migrate the application to Azure Application Gateway with WAF.
Why it's wrong here
Application Gateway is regional and may not reduce latency compared to AFD.
✗
Disable caching in AFD to reduce resource consumption.
Why it's wrong here
Caching does not affect DDoS attack volume.
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 AZ-500 question in full detail.
Identify which AZ-500 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.
Secure networking — This question tests Secure networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable Azure DDoS Network Protection on the AFD origin and configure DDoS protection on AFD. — Option C is correct because Azure DDoS Network Protection combined with AFD's DDoS mitigation provides layered defense. Option A is wrong because rate limiting alone does not stop volumetric DDoS. Option B is wrong because moving to App Gateway does not improve latency. Option D is wrong because disabling caching does not mitigate DDoS.
What should I do if I get this AZ-500 question wrong?
Identify which AZ-500 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.
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Question Discussion
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