The answer is Azure DNS, the correct choice because it is a dedicated hosting service for DNS domains that resolves domain names using Microsoft Azure infrastructure, allowing you to manage DNS records with the same credentials, APIs, and billing as your other Azure services. This service supports common record types like A, AAAA, CNAME, MX, and TXT, and it provides high availability and low latency by leveraging Azure’s global network of name servers. On the AZ-900 exam, this question tests your understanding of core Azure networking services, often appearing alongside other options like Azure Traffic Manager or Azure Front Door—common traps that handle traffic routing or content delivery, not DNS resolution. Remember that Azure DNS is purely about hosting and resolving domain names, not about load balancing or caching. A simple memory tip: think of Azure DNS as the phonebook for your Azure resources—it translates names to IPs, just like a directory service.
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 service provides a DNS hosting service that resolves domain names using the Azure infrastructure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure DNS
Azure DNS is the correct answer because it is a hosting service for DNS domains that provides name resolution using Microsoft Azure infrastructure. It allows you to manage your DNS records using the same credentials, APIs, and billing as your other Azure services, and it supports common DNS record types like A, AAAA, CNAME, MX, NS, PTR, SOA, SRV, and TXT.
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
Traffic Manager provides DNS-based load balancing; Azure DNS is the authoritative DNS hosting service.
✗
Azure Front Door
Why it's wrong here
Front Door provides global load balancing; Azure DNS hosts DNS zones and records.
✓
Azure DNS
Why this is correct
Azure DNS hosts DNS zones and resolves domain names using Azure's global infrastructure.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Private Link
Why it's wrong here
Private Link provides private connectivity to Azure services; Azure DNS handles name resolution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure DNS with Azure Traffic Manager because both involve DNS, but Traffic Manager only uses DNS for traffic routing and does not host DNS zones or provide authoritative name resolution.
Detailed technical explanation
How to think about this question
Azure DNS uses Anycast networking to ensure DNS queries are answered from the closest Azure DNS server, reducing latency and improving resolution speed. It supports DNSSEC (Domain Name System Security Extensions) to add a layer of security by validating DNS responses, and it integrates with Azure RBAC and Azure Policy for fine-grained access control. In a real-world scenario, an organization migrating its on-premises DNS to Azure can use Azure DNS to host its public domain (e.g., contoso.com) and leverage alias records to point to Azure resources like Traffic Manager profiles or CDN endpoints, ensuring seamless failover and traffic management.
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
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.
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 DNS — Azure DNS is the correct answer because it is a hosting service for DNS domains that provides name resolution using Microsoft Azure infrastructure. It allows you to manage your DNS records using the same credentials, APIs, and billing as your other Azure services, and it supports common DNS record types like A, AAAA, CNAME, MX, NS, PTR, SOA, SRV, and TXT.
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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Question Discussion
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