AZ-900 Describe Azure architecture and services Practice Question
Which Azure service provides managed DNS hosting for domain names, enabling reliable and fast DNS queries?
⚠ Common exam trap
It's easy for candidates to confuse Azure Traffic Manager (a DNS-based traffic routing service) with a DNS hosting service, but Traffic Manager does not host DNS zones or manage domain name records—it only uses DNS to direct traffic to endpoints.
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 DNS
Azure DNS is the correct answer because it is a dedicated managed DNS hosting service that provides name resolution using the global Microsoft Azure DNS infrastructure. It supports standard DNS record types (A, AAAA, CNAME, MX, NS, PTR, SOA, SRV, TXT) and offers high availability and low-latency responses by leveraging Anycast networking. This makes it ideal for hosting domain names and ensuring reliable, fast DNS queries.
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 operates at the DNS level to load balance traffic across endpoints using routing methods like performance, priority, or geographic, but it does not host DNS zones or manage your domain's DNS records. It responds to DNS queries by returning the appropriate endpoint's IP address, not by providing authoritative name resolution. The service that hosts DNS zones and provides name resolution is Azure DNS, making Traffic Manager an incorrect choice here.
- ✓
Azure DNS
Why this is correct
Azure DNS is the correct answer because it is a hosting service for DNS zones, providing name resolution through Microsoft's global anycast network, which ensures queries are answered from a nearby point-of-presence for high availability and low latency. It lets you manage your domain's records, such as A, CNAME, and MX, in the Azure portal or programmatically. This fully matches the question's description of hosting DNS zones, while the other services serve different networking purposes.
- ✗
Azure Front Door
Why it's wrong here
Azure Front Door is a global application delivery network that provides HTTP/HTTPS load balancing, SSL offload, and web application firewall capabilities at the edge. It relies on DNS to map your domain to its anycast endpoints, but it does not itself host authoritative DNS zones or allow direct DNS record management. Since the question asks specifically about the service that hosts DNS zones, Front Door is incorrect; Azure DNS fulfills that role.
- ✗
Azure VPN Gateway
Why it's wrong here
Azure VPN Gateway establishes encrypted network connectivity between on-premises infrastructure and Azure through site-to-site or point-to-site IPsec tunnels for secure data transfer. It operates at the network layer, focusing on routing and connectivity, and has no capability to host DNS zones or manage DNS records. DNS hosting is a distinct and separate function provided by Azure DNS, so VPN Gateway cannot be the correct answer.
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Azure Regions and Geographies
Key term
High availability
High availability is a system design approach that aims to keep applications and services operational and accessible with minimal downtime, even when some components fail.
Key term
Azure DNS
Azure DNS is a cloud-based service that lets you host and manage your domain name system (DNS) records using Microsoft's global infrastructure, so your website or app can be reached by people using easy-to-remember names instead of IP addresses.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.