- A
Create a route table with a default route (0.0.0.0/0) to the Azure Firewall private IP and associate it with the spoke subnets.
Route tables override the default system route and force traffic through the firewall.
- B
Configure forced tunneling on the VPN gateway to route all traffic through the Azure Firewall.
Why wrong: Forced tunneling is for VPN connections to on-premises, not for internet traffic from spoke VMs.
- C
Create a route table with a default route to the VPN gateway and associate it with the hub subnet.
Why wrong: This would send traffic to the VPN gateway, not the firewall, and the route table should be on spoke subnets.
- D
Configure an NSG on the spoke subnets with a rule that sends traffic to the Azure Firewall.
Why wrong: NSGs cannot specify next hops; they only allow/deny traffic.
Quick Answer
The correct answer is to create a route table with a default route (0.0.0.0/0) pointing to the Azure Firewall private IP and associate it with the spoke subnets. This works because User-Defined Routes (UDRs) override Azure’s default system routes; by setting the next hop to the firewall’s private IP, all outbound internet traffic from spoke VMs is forced through the firewall for inspection and logging. On the AZ-500 exam, this scenario tests your understanding of forced tunneling in a hub-and-spoke topology, often appearing as a distractor where candidates mistakenly associate the route with the hub subnet or try to use an NSG as a next hop—neither of which is valid. A common trap is thinking the VPN gateway can filter traffic, but it only handles encrypted tunnels, not stateful inspection. Remember the memory tip: “Spoke subnets get the default route; the firewall is the next hop, not the gateway.”
AZ-500 Secure networking Practice Question
This AZ-500 practice question tests your understanding of secure networking. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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-and-spoke network topology in Azure. The hub virtual network contains an Azure Firewall and a VPN gateway. Spoke virtual networks are peered to the hub. The security team wants to ensure that all outbound internet traffic from VMs in the spokes flows through the Azure Firewall. What should be configured?
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
Create a route table with a default route (0.0.0.0/0) to the Azure Firewall private IP and associate it with the spoke subnets.
Option B is correct because a route table with a default route (0.0.0.0/0) pointing to the Azure Firewall as the next hop, applied to the subnets in the spoke VNets, forces all outbound traffic through the firewall. Option A is wrong because Azure Firewall does not support network security group (NSG) next hops. Option C is wrong because the route table must be associated with the spoke subnets, not the hub subnet. Option D is wrong because VPN gateway does not filter traffic; Azure Firewall is needed.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Create a route table with a default route (0.0.0.0/0) to the Azure Firewall private IP and associate it with the spoke subnets.
- ✗
Configure forced tunneling on the VPN gateway to route all traffic through the Azure Firewall.
Why it's wrong here
Forced tunneling is for VPN connections to on-premises, not for internet traffic from spoke VMs.
- ✗
Create a route table with a default route to the VPN gateway and associate it with the hub subnet.
- ✗
Configure an NSG on the spoke subnets with a rule that sends traffic to the Azure Firewall.
Why it's wrong here
NSGs cannot specify next hops; they only allow/deny traffic.
Common exam traps
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.
Detailed technical explanation
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.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
- →
Secure networking — study guide chapter
Learn the concepts, then practise the questions
- →
Secure networking practice questions
Targeted practice on this topic area only
- →
All AZ-500 questions
1,000 questions across all exam domains
- →
Microsoft Azure Security Engineer Associate AZ-500 study guide
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- →
AZ-500 practice test guide
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FAQ
Questions learners often ask
What does this AZ-500 question test?
Secure networking — This question tests Secure networking — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Create a route table with a default route (0.0.0.0/0) to the Azure Firewall private IP and associate it with the spoke subnets. — Option B is correct because a route table with a default route (0.0.0.0/0) pointing to the Azure Firewall as the next hop, applied to the subnets in the spoke VNets, forces all outbound traffic through the firewall. Option A is wrong because Azure Firewall does not support network security group (NSG) next hops. Option C is wrong because the route table must be associated with the spoke subnets, not the hub subnet. Option D is wrong because VPN gateway does not filter traffic; Azure Firewall is needed.
What should I do if I get this AZ-500 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
About these practice questions
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Last reviewed: Jun 21, 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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