Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A global e-commerce company runs its website on Azure virtual machines in two different Azure regions: West US and East US. The company wants to distribute incoming web traffic to the region that provides the lowest latency for each user. Additionally, if one region becomes unavailable, all traffic should automatically fail over to the healthy region. The solution must not require any changes to the web application code. 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
Best answer
Azure Traffic Manager
Correct. Azure Traffic Manager uses DNS to direct client traffic to the closest or healthiest regional endpoint based on the performance routing method. It automatically fails over in case of region failure, and requires no application changes.
B
Distractor review
Azure Load Balancer
Incorrect. Azure Load Balancer distributes incoming traffic within a single Azure region, not across multiple regions. It does not provide latency-based routing across regions.
C
Distractor review
Azure Application Gateway
Incorrect. Azure Application Gateway is a regional web traffic load balancer that operates at the application layer (HTTP/HTTPS). It does not offer cross-region latency-based routing or automatic failover across regions.
D
Distractor review
Azure Front Door
Incorrect. Azure Front Door provides global load balancing and application acceleration, but it is more complex than required. For a simple DNS-based performance routing and failover requirement without any code changes, Azure Traffic Manager is the simpler and correct solution.
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 Traffic Manager — Azure Traffic Manager is a DNS-based traffic load balancer that can distribute traffic to services across multiple Azure regions based on routing methods such as performance (latency) and priority (failover). It operates at the DNS level, so no changes to the application code are needed. Azure Load Balancer distributes traffic within a single region, not across regions. Azure Application Gateway provides HTTP load balancing with advanced features like SSL termination and URL path routing, but it is primarily a regional service and not designed for multi-region latency-based routing. Azure Front Door is a global service that also offers application acceleration and WAF, but it works at the application layer and is more feature-rich; however, for a simple latency-based routing and failover requirement without code changes, Traffic Manager is the appropriate choice.
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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