Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A company is deploying a multi-tier web application on Azure VMs. The web tier must be accessible from the internet, while the application and database tiers must be isolated within the virtual network. The solution must provide SSL termination, web application firewall (WAF) capabilities, and URL-based routing. Which Azure service should they use to expose the web tier?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Use an Azure Load Balancer and configure NSGs on each subnet.
Azure Load Balancer is a layer 4 service and does not provide SSL termination, WAF, or URL-based routing. NSGs alone cannot provide those capabilities.
B
Distractor review
Use Azure Firewall to inspect all traffic and allow internet traffic to the web tier.
Azure Firewall is a stateful firewall that operates at layers 3-4 with some layer 7 capabilities, but it is not optimized for inbound web traffic with SSL offloading and URL routing like a WAF-enabled service.
C
Best answer
Use Azure Application Gateway with WAF, and configure NSGs to restrict traffic between tiers.
Application Gateway provides SSL termination, WAF, and URL routing. NSGs on subnets can enforce isolation by allowing only necessary traffic (e.g., only web tier to app tier on specific ports).
D
Distractor review
Use Azure Front Door to expose the web tier and NSGs for internal isolation.
Azure Front Door is a global load balancer, suitable for multi-region scenarios. For a single-region deployment, Application Gateway is more appropriate and cost-effective, and Front Door does not inherently provide isolation between tiers.
Common exam trap
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Technical deep dive
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A company is designing hub-and-spoke networking. Spoke VNets must use a central Azure Firewall for outbound internet traffic. Which two configurations are required?
Question 2
A company is designing private access to a PaaS database from workloads in a VNet. The database should not be reachable over its public endpoint. What should be recommended?
Question 3
A data platform must support analytical queries over petabytes of files in a data lake, while preserving hierarchical namespaces and fine-grained ACLs. Which storage service should you design around?
Question 4
A database workload has an RPO of 15 minutes and an RTO of 4 hours. Cost is more important than near-zero data loss. Which design is usually more appropriate than synchronous multi-region replication?
Question 5
A hub-and-spoke Azure network must centralize outbound inspection and still allow spokes to resolve private endpoint DNS names. Which two components are commonly required? (Choose 2.)
Question 6
A multinational company uses Microsoft Entra ID and several Azure subscriptions. Security administrators need to review privileged role assignments every month and require justification for continued access. Which design should be recommended?
FAQ
Questions learners often ask
What does this AZ-305 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Use Azure Application Gateway with WAF, and configure NSGs to restrict traffic between tiers. — Azure Application Gateway is a layer 7 load balancer that provides SSL termination, WAF, and URL path-based routing. It can be placed in front of the web tier to handle incoming HTTP traffic. Network Security Groups (NSGs) can then be used to isolate the application and database tiers by restricting traffic to only the necessary ports and IP addresses. Option C combines Application Gateway for exposure and NSGs for isolation. Option A lacks SSL/WAF features. Option B uses Azure Firewall which is more for east-west and outbound traffic, not ideal for inbound web with WAF. Option D uses Load Balancer which is layer 4 and does not provide WAF or URL routing.
What should I do if I get this AZ-305 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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