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 architecture for a three-tier application in Azure. The web tier must be accessible from the internet. The application tier must only accept traffic from the web tier. The database tier must only accept traffic from the application tier. Which TWO Azure services should you use to enforce these network rules? (Choose two.)
Azure Bastion
Why wrong: Secure remote access, not traffic filtering.
Network Security Groups (NSGs)
Restrict traffic between subnets.
Azure Application Gateway
Web traffic routing and WAF.
Azure Front Door
Why wrong: Global load balancer, not tier isolation.
Azure Firewall
Why wrong: Overkill for simple tier isolation.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Network Security Groups (NSGs)
Options A and D are correct. Azure Application Gateway provides web traffic routing and WAF. Network Security Groups (NSGs) allow inbound/outbound rules to restrict traffic between tiers. Option B is wrong because Azure Firewall is a stateful firewall but not needed for simple tier isolation. Option C is wrong because Azure Bastion is for RDP/SSH access. Option E is wrong because Azure Front Door is for global load balancing.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure Bastion
Why it's wrong here
Secure remote access, not traffic filtering.
Network Security Groups (NSGs)
Why this is correct
Restrict traffic between subnets.
Related concept
Read the scenario before looking for a memorised answer.
Azure Application Gateway
Why this is correct
Web traffic routing and WAF.
Related concept
Read the scenario before looking for a memorised answer.
Azure Front Door
Why it's wrong here
Global load balancer, not tier isolation.
Azure Firewall
Why it's wrong here
Overkill for simple tier isolation.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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.
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FAQ
Design infrastructure solutions — This question tests Design infrastructure solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Network Security Groups (NSGs) — Options A and D are correct. Azure Application Gateway provides web traffic routing and WAF. Network Security Groups (NSGs) allow inbound/outbound rules to restrict traffic between tiers. Option B is wrong because Azure Firewall is a stateful firewall but not needed for simple tier isolation. Option C is wrong because Azure Bastion is for RDP/SSH access. Option E is wrong because Azure Front Door is for global load balancing.
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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
This AZ-305 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-305 exam.
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