- A
Azure Firewall
Azure Firewall provides stateful inspection and can filter traffic between spoke VNets when configured as a hub. It supports network and application rules, including threat intelligence-based filtering.
- B
Network Security Groups (NSG) on the peering connections
Why wrong: NSGs are stateful for individual flows but cannot inspect or filter traffic at the peering level effectively. They are also limited to Layer 3/4 and cannot provide application-layer inspection.
- C
Azure Application Gateway with WAF
Why wrong: Application Gateway is a Layer 7 load balancer with Web Application Firewall (WAF) for HTTP/HTTPS traffic. It does not handle general inter-VNet traffic.
- D
Azure DDoS Protection Standard
Why wrong: DDoS Protection protects against distributed denial-of-service attacks at the network layer but does not inspect or filter normal traffic between VNets.
Quick Answer
The answer is Azure Firewall, the fully stateful, managed firewall service that must be deployed in the hub virtual network to inspect and filter all inter-spoke traffic in a hub-spoke topology. Azure Firewall is the correct choice because it maintains stateful packet inspection at Layers 3–7, tracking the state of active connections to detect and block malicious content across spoke-to-spoke flows. On the AZ-500 exam, this scenario tests your understanding of how user-defined routes (UDRs) force traffic through the hub’s Azure Firewall for centralized inspection, a common pattern for securing east-west traffic. A frequent trap is selecting a network security group (NSG), which is stateless and cannot perform deep packet inspection or maintain connection state across spokes. Remember the key distinction: Azure Firewall is stateful and managed; NSGs are stateless and apply only at the subnet or NIC level. For a quick memory tip, think “Hub Firewall, Spoke Flow” — the hub’s Azure Firewall is the single chokepoint for all inter-spoke stateful inspection.
AZ-500 Secure networking Practice Question
This AZ-500 practice question tests your understanding of secure networking. 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.
A company has a hub-spoke network topology in Azure. They need to inspect and filter all traffic flowing between spoke virtual networks for malicious content and require that the inspection is stateful. Which Azure-native service should they deploy in the hub virtual network to meet this requirement?
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 Firewall
Azure Firewall is the correct choice because it is a fully stateful, managed firewall service that can inspect and filter traffic at Layers 3–7. In a hub-spoke topology, deploying Azure Firewall in the hub virtual network allows it to centrally inspect all traffic flowing between spoke virtual networks via forced tunneling (user-defined routes) or through the hub's network virtual appliance, meeting the requirement for stateful inspection of inter-spoke traffic.
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 Firewall
Why this is correct
Azure Firewall provides stateful inspection and can filter traffic between spoke VNets when configured as a hub. It supports network and application rules, including threat intelligence-based filtering.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Network Security Groups (NSG) on the peering connections
Why it's wrong here
NSGs are stateful for individual flows but cannot inspect or filter traffic at the peering level effectively. They are also limited to Layer 3/4 and cannot provide application-layer inspection.
- ✗
Azure Application Gateway with WAF
Why it's wrong here
Application Gateway is a Layer 7 load balancer with Web Application Firewall (WAF) for HTTP/HTTPS traffic. It does not handle general inter-VNet traffic.
- ✗
Azure DDoS Protection Standard
Why it's wrong here
DDoS Protection protects against distributed denial-of-service attacks at the network layer but does not inspect or filter normal traffic between VNets.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse NSGs as stateful (they are stateless) or assume Azure Firewall is only for internet-bound traffic, missing that it can also inspect east-west traffic between spoke VNets via forced tunneling.
Detailed technical explanation
How to think about this question
Azure Firewall uses a stateful packet inspection engine that tracks the state of active connections (e.g., TCP handshake, UDP flows) and allows return traffic automatically. In a hub-spoke topology, you configure user-defined routes (UDRs) on each spoke subnet to force inter-spoke traffic through the Azure Firewall's private IP in the hub, ensuring all traffic is inspected. A subtle behavior is that Azure Firewall supports SNAT for outbound traffic to the internet but does not SNAT traffic between spoke VNets by default, preserving the original source IP for logging and inspection.
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.
TExam Day Tips
- 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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Secure networking — study guide chapter
Learn the concepts, then practise the questions
- →
Secure networking practice questions
Targeted practice on this topic area only
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All AZ-500 questions
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Microsoft Azure Security Engineer Associate AZ-500 study guide
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AZ-500 practice test guide
How to use practice tests most effectively before exam day
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FAQ
Questions learners often ask
What does this AZ-500 question test?
Secure networking — This question tests Secure networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Firewall — Azure Firewall is the correct choice because it is a fully stateful, managed firewall service that can inspect and filter traffic at Layers 3–7. In a hub-spoke topology, deploying Azure Firewall in the hub virtual network allows it to centrally inspect all traffic flowing between spoke virtual networks via forced tunneling (user-defined routes) or through the hub's network virtual appliance, meeting the requirement for stateful inspection of inter-spoke traffic.
What should I do if I get this AZ-500 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on AZ-500
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company uses a hub-spoke network topology in Azure. They need to inspect and filter all traffic flowing between spoke virtual networks for security compliance. Which Azure-native service should be deployed in the hub virtual network to achieve this?
medium- ✓ A.Azure Firewall
- B.Network Virtual Appliance (NVA)
- C.Azure VPN Gateway
- D.Azure Load Balancer
Why A: Azure Firewall is a fully managed, stateful firewall-as-a-service that can inspect and filter traffic between spoke virtual networks when deployed in the hub VNet. It supports application (FQDN) and network (IP/port/protocol) rules, and can enforce security compliance by logging and blocking non-compliant traffic. Unlike a Network Virtual Appliance (NVA), Azure Firewall is a native PaaS service with built-in high availability and auto-scaling, making it the recommended choice for hub-spoke traffic inspection.
Last reviewed: Jun 11, 2026
This AZ-500 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-500 exam.
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