- A
Azure Traffic Manager
Why wrong: Azure Traffic Manager provides DNS-based traffic routing for global distribution and can perform failover, but it operates at the DNS level and does not include a web application firewall (WAF). It cannot inspect HTTPS traffic for exploits, so it does not meet the security requirement.
- B
Azure Load Balancer
Why wrong: Azure Load Balancer operates at layer 4 (TCP/UDP) and distributes traffic only within a single region. It does not provide global routing based on latency, nor does it include a WAF or any application-layer security features. Therefore, it cannot fulfill the multi-region failover or web exploit protection needs.
- C
Azure Application Gateway
Why wrong: Azure Application Gateway is a regional layer 7 load balancer that supports WAF and HTTP/HTTPS traffic. However, it is designed to distribute traffic within a single region and does not offer the global, latency-based routing and cross-region failover required for the e-commerce company’s worldwide deployment.
- D
Azure Front Door
Azure Front Door is a global application delivery network that routes HTTP/HTTPS traffic to the nearest region using latency-based routing. It provides automatic failover across regions and includes a built-in web application firewall (WAF) to protect against common exploits at the network edge, making it the correct choice for the company’s requirements.
Quick Answer
The answer is Azure Front Door. This service is the correct choice because it combines global, latency-based routing with automatic failover and a built-in web application firewall (WAF) at the edge, directly addressing the need to route users to the fastest region while blocking SQL injection and cross-site scripting attacks. On the Microsoft Azure Fundamentals AZ-900 exam, this scenario tests your understanding of how Azure Front Door operates at Layer 7 to provide both performance optimization and security, often contrasting it with simpler services like Traffic Manager (which lacks WAF and operates at DNS level) or Application Gateway (which is regional, not global). A common trap is confusing Azure Front Door with Azure Traffic Manager; remember that Front Door is the only one offering integrated WAF protection and HTTP-level routing. Memory tip: think "Front Door = Fast + Firewall + Failover" for the three key features in this question.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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.
An international e-commerce company has deployed its web application in two Azure regions to serve customers globally. The solution must automatically route users to the region with the lowest latency, provide high availability with automatic failover if one region becomes unavailable, and protect the application from common web exploits such as SQL injection and cross-site scripting at the edge. Which Azure service should the company 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
Azure Front Door
Azure Front Door is a global, scalable entry point that provides HTTP(S) load balancing with latency-based routing, automatic failover across regions, and built-in web application firewall (WAF) protection against common exploits like SQL injection and cross-site scripting. It operates at Layer 7 (application layer) and integrates with Azure WAF policies at the edge, making it the correct choice for this scenario.
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 Traffic Manager
Why it's wrong here
Azure Traffic Manager provides DNS-based traffic routing for global distribution and can perform failover, but it operates at the DNS level and does not include a web application firewall (WAF). It cannot inspect HTTPS traffic for exploits, so it does not meet the security requirement.
- ✗
Azure Load Balancer
Why it's wrong here
Azure Load Balancer operates at layer 4 (TCP/UDP) and distributes traffic only within a single region. It does not provide global routing based on latency, nor does it include a WAF or any application-layer security features. Therefore, it cannot fulfill the multi-region failover or web exploit protection needs.
- ✗
Azure Application Gateway
Why it's wrong here
Azure Application Gateway is a regional layer 7 load balancer that supports WAF and HTTP/HTTPS traffic. However, it is designed to distribute traffic within a single region and does not offer the global, latency-based routing and cross-region failover required for the e-commerce company’s worldwide deployment.
- ✓
Azure Front Door
Why this is correct
Azure Front Door is a global application delivery network that routes HTTP/HTTPS traffic to the nearest region using latency-based routing. It provides automatic failover across regions and includes a built-in web application firewall (WAF) to protect against common exploits at the network edge, making it the correct choice for the company’s requirements.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Traffic Manager (global DNS routing) with Azure Front Door (global HTTP/S routing with WAF), overlooking that Traffic Manager lacks application-layer security and WAF capabilities required for protecting against web exploits.
Detailed technical explanation
How to think about this question
Azure Front Door uses Anycast protocol to route users to the nearest point of presence (PoP) based on latency, and it supports health probes to automatically fail over traffic to a healthy backend region. Its integrated WAF policies can be customized with managed rule sets (e.g., OWASP CRS) to block malicious requests at the edge before they reach the application, reducing backend load and attack surface.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
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FAQ
Questions learners often ask
What does this AZ-900 question test?
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Front Door — Azure Front Door is a global, scalable entry point that provides HTTP(S) load balancing with latency-based routing, automatic failover across regions, and built-in web application firewall (WAF) protection against common exploits like SQL injection and cross-site scripting. It operates at Layer 7 (application layer) and integrates with Azure WAF policies at the edge, making it the correct choice for this scenario.
What should I do if I get this AZ-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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Same concept, more angles
1 more ways this is tested on AZ-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A global retail company hosts its e-commerce web application on Azure virtual machines in three Azure regions: West Europe, East US, and Southeast Asia. The application must provide a single HTTPS entry point for customers worldwide. The company requires the solution to: route each user to the region that provides the best performance (lowest latency), automatically redirect traffic to a healthy region if one becomes unavailable, and protect the application from common web vulnerabilities such as SQL injection and cross-site scripting (XSS) by inspecting all incoming HTTP/HTTPS traffic at the edge. Which Azure service should the company use?
medium- A.Azure Traffic Manager with a Web Application Firewall (WAF) policy applied to each backend virtual machine
- ✓ B.Azure Front Door
- C.Azure Application Gateway
- D.Azure Load Balancer
Why B: Azure Front Door is the correct choice because it provides global HTTP(S) load balancing with latency-based routing to the nearest region, automatic failover across regions, and built-in Web Application Firewall (WAF) at the edge to inspect all incoming traffic for SQL injection and XSS. This single service meets all three requirements—performance routing, regional failover, and edge-level web vulnerability protection—without needing additional components.
Last reviewed: Jun 11, 2026
This AZ-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 AZ-900 exam.
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