The answer is Azure DNS, as it is the only Azure service that provides a fully managed DNS solution with native support for custom domains and DNSSEC. Azure DNS allows you to host your DNS zones and manage resource records while optionally enabling DNSSEC to add a layer of security by digitally signing DNS data, preventing spoofing and cache poisoning attacks. On the AZ-305 exam, this question tests your ability to distinguish between DNS hosting and traffic routing services; a common trap is confusing Azure Traffic Manager or Azure Front Door, which use DNS for load balancing but do not manage zones or support DNSSEC. Remember that Azure DNS is the authoritative name server service, while Traffic Manager and Front Door are traffic-routing overlays that rely on external DNS. A useful memory tip: "DNS for zones, Traffic for routes, Front Door for edges"—only Azure DNS handles zone management and DNSSEC signing.
AZ-305 Design infrastructure solutions Practice Question
This AZ-305 practice question tests your understanding of design infrastructure solutions. 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 TWO Azure services can be used to provide a fully managed DNS solution that supports custom domains and DNSSEC?
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 provides managed DNS with DNSSEC support (if enabled for certain zones). Azure Traffic Manager uses DNS to route traffic but does not manage DNS zones directly. Azure Front Door uses custom domains but does not provide DNS hosting or DNSSEC. Azure App Service provides custom domains but not DNS management. Azure Public IP does not provide DNS. Therefore, only Azure DNS supports DNSSEC and custom domains.
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 uses custom domains but does not provide DNS hosting or DNSSEC.
✓
Azure DNS
Why this is correct
Azure DNS is a fully managed DNS service that supports DNSSEC and custom domains.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Traffic Manager
Why it's wrong here
Traffic Manager is a DNS-based traffic load balancer, not a DNS hosting service.
✗
Azure App Service
Why it's wrong here
App Service can use custom domains but does not provide DNS management.
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 question in full detail.
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Design infrastructure solutions — This question tests Design infrastructure solutions — 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 provides managed DNS with DNSSEC support (if enabled for certain zones). Azure Traffic Manager uses DNS to route traffic but does not manage DNS zones directly. Azure Front Door uses custom domains but does not provide DNS hosting or DNSSEC. Azure App Service provides custom domains but not DNS management. Azure Public IP does not provide DNS. Therefore, only Azure DNS supports DNSSEC and custom domains.
What should I do if I get this AZ-305 question wrong?
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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