- A
DDoS Protection Basic (default)
DDoS Protection Basic is always on for all Azure resources and provides automatic detection and mitigation of common network-layer DDoS attacks. No configuration is needed, and it is adequate for a single web app.
- B
DDoS Protection Standard
Why wrong: DDoS Protection Standard must be enabled on a virtual network and provides enhanced mitigation capabilities, dedicated traffic monitoring, and cost protection. It is not required for a single App Service because Basic already covers network-layer attacks.
- C
Azure Web Application Firewall (WAF) on Application Gateway
Why wrong: WAF protects against application-layer attacks (Layer 7) like SQL injection, not network-layer DDoS attacks. It can be used alongside DDoS Protection but does not replace it.
- D
Azure Front Door with DDoS Protection Standard
Why wrong: Front Door provides global load balancing and can have DDoS Protection Standard enabled on its associated virtual network, but this is an unnecessary for the stated requirement for a single App Service and incurs additional cost. Basic remains the default and sufficient option.
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. A key principle to apply: dDoS Protection Basic is automatically enabled for all Azure resources.. 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 public-facing web application on Azure App Service in the West US region. They want to protect against network-layer (Layer 3/4) DDoS attacks and have a single web application. Which Azure DDoS Protection tier should they use?
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
DDoS Protection Basic (default)
DDoS Protection Basic is automatically enabled for all Azure resources at no additional cost, providing always-on traffic monitoring and real-time mitigation of common network-layer (Layer 3/4) attacks, such as SYN floods, UDP floods, and reflection attacks. Since the company has a single web application and only needs protection against Layer 3/4 DDoS attacks, the Basic tier is sufficient and requires no configuration or extra cost.
Key principle: DDoS Protection Basic is automatically enabled for all Azure resources.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DDoS Protection Basic (default)
Why this is correct
DDoS Protection Basic is always on for all Azure resources and provides automatic detection and mitigation of common network-layer DDoS attacks. No configuration is needed, and it is adequate for a single web app.
Related concept
DDoS Protection Basic is automatically enabled for all Azure resources.
- ✗
DDoS Protection Standard
Why it's wrong here
DDoS Protection Standard must be enabled on a virtual network and provides enhanced mitigation capabilities, dedicated traffic monitoring, and cost protection. It is not required for a single App Service because Basic already covers network-layer attacks.
- ✗
Azure Web Application Firewall (WAF) on Application Gateway
Why it's wrong here
WAF protects against application-layer attacks (Layer 7) like SQL injection, not network-layer DDoS attacks. It can be used alongside DDoS Protection but does not replace it.
- ✗
Azure Front Door with DDoS Protection Standard
Why it's wrong here
Front Door provides global load balancing and can have DDoS Protection Standard enabled on its associated virtual network, but this is an unnecessary for the stated requirement for a single App Service and incurs additional cost. Basic remains the default and sufficient option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume DDoS Protection Standard is always required for any DDoS protection, overlooking that Basic is automatically enabled and sufficient for Layer 3/4 attacks on a single resource, while Standard is an enhanced add-on for complex, multi-resource environments needing advanced features.
Detailed technical explanation
How to think about this question
DDoS Protection Basic uses Azure's global network infrastructure to absorb and scrub attacks at the edge, leveraging the same mitigation capacity used for Microsoft's own services. It automatically detects and mitigates common Layer 3/4 attacks like SYN floods (up to 200,000 packets per second) and UDP floods, but does not provide attack telemetry, adaptive tuning, or cost protection for scaled-out resources. For a single App Service, Basic is adequate because the platform's inherent scale and automatic mitigation handle typical volumetric attacks without manual intervention.
KKey Concepts to Remember
- DDoS Protection Basic is automatically enabled for all Azure resources.
- It provides always-on, no-cost protection against common network-layer (Layer 3/4) DDoS attacks.
- No configuration or deployment is required for DDoS Protection Basic.
- Azure App Service benefits from DDoS Protection Basic by default.
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
DDoS Protection Basic is automatically enabled for all Azure resources.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Review dDoS Protection Basic is automatically enabled for all Azure resources., then practise related AZ-500 questions on the same topic to reinforce the concept.
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Secure networking — study guide chapter
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FAQ
Questions learners often ask
What does this AZ-500 question test?
Secure networking — This question tests Secure networking — DDoS Protection Basic is automatically enabled for all Azure resources..
What is the correct answer to this question?
The correct answer is: DDoS Protection Basic (default) — DDoS Protection Basic is automatically enabled for all Azure resources at no additional cost, providing always-on traffic monitoring and real-time mitigation of common network-layer (Layer 3/4) attacks, such as SYN floods, UDP floods, and reflection attacks. Since the company has a single web application and only needs protection against Layer 3/4 DDoS attacks, the Basic tier is sufficient and requires no configuration or extra cost.
What should I do if I get this AZ-500 question wrong?
Review dDoS Protection Basic is automatically enabled for all Azure resources., then practise related AZ-500 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
DDoS Protection Basic is automatically enabled for all Azure resources.
About these practice questions
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Last reviewed: Jun 11, 2026
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