The answer is Azure Traffic Manager. This service is correct because it provides a distributed, highly available, and scalable DNS-based traffic routing solution that directs users to the best-performing endpoint without proxying their traffic. Instead of handling data packets directly, Azure Traffic Manager uses DNS responses to route users based on routing methods like performance (lowest latency), priority, geographic location, or weighted distribution, ensuring high availability across global Azure regions. On the AZ-900 exam, this question tests your understanding of how Azure Traffic Manager differs from other load balancers like Azure Load Balancer (which operates at Layer 4) or Application Gateway (Layer 7); a common trap is confusing DNS-based routing with proxy-based load balancing. Remember the key distinction: Traffic Manager works at the DNS level, not the network level, so it’s ideal for global traffic distribution without modifying the traffic flow itself. For a memory tip, think “DNS directs, not proxies” to recall that Azure Traffic Manager routes users via DNS responses, not by intercepting connections.
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.
Which Azure networking service provides a distributed, highly available, and scalable DNS service for routing users to the best-performing endpoint?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Traffic Manager
Azure Traffic Manager is a DNS-based traffic load balancer that distributes traffic to the best-performing endpoint across global Azure regions. It uses DNS responses to direct users to the endpoint with the lowest latency or highest priority, providing high availability and scalability without proxying traffic.
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 Front Door
Why it's wrong here
Front Door provides layer 7 global load balancing with caching; Traffic Manager provides DNS-based global routing.
✓
Azure Traffic Manager
Why this is correct
Traffic Manager routes users to the best endpoint using DNS-based routing methods (performance, failover, geographic).
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Load Balancer
Why it's wrong here
Azure Load Balancer operates at layer 4 within a region; Traffic Manager provides global DNS-based routing.
✗
Azure Application Gateway
Why it's wrong here
Application Gateway provides layer 7 load balancing within a region; Traffic Manager routes across regions via DNS.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse Azure Front Door (which also provides global routing and performance optimization) with Traffic Manager, but Front Door operates at the application layer (HTTP/HTTPS) and proxies traffic, while Traffic Manager is purely DNS-based and works with any protocol.
Detailed technical explanation
How to think about this question
Traffic Manager uses DNS resolution to route users based on traffic-routing methods like Performance, Geographic, or Priority. It does not sit in the data path; instead, it returns the DNS A record of the chosen endpoint, so clients connect directly. This makes it ideal for global failover scenarios where you want to avoid a single point of failure without adding latency from a proxy.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
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 Traffic Manager — Azure Traffic Manager is a DNS-based traffic load balancer that distributes traffic to the best-performing endpoint across global Azure regions. It uses DNS responses to direct users to the endpoint with the lowest latency or highest priority, providing high availability and scalability without proxying traffic.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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