Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
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
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
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Azure Traffic Manager
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
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Azure Load Balancer
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
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Azure Application Gateway
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
Best answer
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.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer is building a serverless application that requires integration with an on-premises SQL Server database for real-time data processing. The on-premises network is connected to Azure via a site-to-site VPN. Which Azure service would allow the function to securely access the on-premises database without exposing it to the public internet?
Question 2
A solutions architect is designing a storage solution for a large media company. The company needs to store video files that are accessed infrequently but must be retained for several years for compliance. Which two Azure storage options meet these requirements? (Select two.)
Question 3
A company deploys a multi-tier application using Azure virtual machines. The web tier VMs must be evenly distributed across two distinct data centers within an Azure region to avoid a single point of failure from an infrastructure outage. Which Azure construct should they use to meet this requirement?
Question 4
A company wants to enforce a set of security policies across all their Azure subscriptions. They have created several individual policy definitions. Which Azure construct should they use to group these policies together and assign them as a single package?
Question 5
A company deploys a line-of-business application on an Azure virtual machine. The IT team wants to ensure the application remains secure. According to the shared responsibility model, which of the following security tasks is the sole responsibility of the customer (the company)?
Question 6
A company develops a web API that runs on Azure App Service. The development team wants to deploy a new version of the API to a staging environment, run integration tests against it, and then gradually shift production traffic to the new version. If any issues are detected, they want to immediately roll back to the previous version without redeploying. Which Azure App Service feature should the team use to meet these requirements?
FAQ
Questions learners often ask
What does this AZ-900 question test?
Static NAT maps one inside address to one outside address.
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 uses the Microsoft global network to route HTTP/HTTPS traffic to the closest backend with low latency. It provides built-in load balancing across multiple regions, automatic failover, and a web application firewall (WAF) at the edge to protect against common web exploits. This makes it the ideal service for the described requirements.
What should I do if I get this AZ-900 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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