The answer is to deploy Azure Front Door with geographic routing and enable DDoS protection. This solution meets all requirements because Azure Front Door provides global load balancing with automatic failover, routing traffic to the nearest healthy application instance based on geographic location, while its integrated Azure DDoS Protection Basic safeguards against network-layer attacks at no additional cost. On the AZ-305 exam, this scenario tests your ability to distinguish between global and regional services: a common trap is choosing Azure Traffic Manager, which offers DNS-based routing but lacks DDoS protection and has slower failover, or selecting Application Gateway, which is regional and cannot route across global regions. Remember that for any global, latency-sensitive, and DDoS-resilient design, Azure Front Door is the single service that combines geographic routing, automatic failover, and built-in DDoS protection—think of it as the “global traffic cop with a shield.”
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.
You are designing a network topology for a global e-commerce company that operates multiple web applications. The company has three main offices (New York, London, Tokyo) connected via ExpressRoute to Azure. Users access the applications through a public endpoint. The company requires that traffic be routed to the nearest healthy application instance based on geographic location, and that the solution provide automatic failover if an entire region goes down. Additionally, the company wants to protect against DDoS attacks at the network layer. You need to recommend a solution that meets these requirements while minimizing cost. What should you include in the design?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy Azure Front Door with geographic routing and enable DDoS protection.
Option C is correct because Azure Front Door provides global load balancing with automatic failover, geographic routing, and integrated DDoS protection (Azure DDoS Protection Basic is included). Option A is wrong because Traffic Manager provides DNS-based routing without DDoS protection and has slower failover. Option B is wrong because Application Gateway is regional, not global. Option D is wrong because Azure Firewall is a stateful firewall but does not provide global load balancing or geographic routing.
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.
✓
Deploy Azure Front Door with geographic routing and enable DDoS protection.
Why this is correct
Front Door provides global load balancing, geographic routing, and DDoS protection.
Related concept
Read the scenario before looking for a memorised answer.
✗
Deploy Azure Firewall in each region and use Public IP prefix for egress.
Deploy Azure Traffic Manager with geographic routing and Azure DDoS Standard protection.
Why it's wrong here
Traffic Manager lacks DDoS protection and failover is DNS-dependent.
Common exam traps
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 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-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: Deploy Azure Front Door with geographic routing and enable DDoS protection. — Option C is correct because Azure Front Door provides global load balancing with automatic failover, geographic routing, and integrated DDoS protection (Azure DDoS Protection Basic is included). Option A is wrong because Traffic Manager provides DNS-based routing without DDoS protection and has slower failover. Option B is wrong because Application Gateway is regional, not global. Option D is wrong because Azure Firewall is a stateful firewall but does not provide global load balancing or geographic routing.
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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