The required configurations are adding a route table to the spoke subnet with a 0.0.0.0/0 route to the Azure Firewall private IP and configuring the firewall itself to allow or deny outbound traffic. This works because the user-defined route (UDR) forces all spoke outbound traffic to the firewall’s private IP address for inspection, while the firewall’s rule collections determine whether that traffic is permitted or blocked. On the AZ-500 exam, this scenario tests your understanding of how to route spoke outbound traffic through Azure Firewall in a hub-spoke topology without relying on public IPs or additional VNet peering. A common trap is confusing forced tunneling with a simple UDR—forced tunneling sends all traffic to an on-premises network, whereas here you only need a default route pointing to the firewall’s private IP. Remember the memory tip: “Route to the firewall, then let the firewall decide.”
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.
Your company has a hub-spoke network topology in Azure. The hub VNet contains an Azure Firewall. Spoke VNets are peered to the hub. You need to ensure that all outbound traffic from virtual machines in a spoke VNet passes through the Azure Firewall for inspection. Which two configurations are required? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure an application rule or network rule on Azure Firewall to allow outbound traffic
Option B is correct because a route table with a default route (0.0.0.0/0) to the Azure Firewall private IP must be associated with the spoke subnet. Option D is correct because the firewall must be configured to allow or deny outbound traffic. Option A is wrong because VNet peering is already in place; no additional peering is needed. Option C is wrong because Azure Firewall doesn't require a public IP for outbound inspection if using private IP; also NAT rules are for inbound. Option E is wrong because forced tunneling is a different concept; the route table handles this.
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.
✗
Configure a DNAT rule on Azure Firewall to translate outbound traffic
Why it's wrong here
DNAT is for inbound traffic; outbound uses SNAT rules or simply allow/deny.
✗
Create a new VNet peering between the spoke and hub
Why it's wrong here
Peering already exists; no new peering needed.
✓
Configure an application rule or network rule on Azure Firewall to allow outbound traffic
Why this is correct
Firewall rules define what outbound traffic is permitted.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-500 question in full detail.
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 — This question tests Secure networking — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Configure an application rule or network rule on Azure Firewall to allow outbound traffic — Option B is correct because a route table with a default route (0.0.0.0/0) to the Azure Firewall private IP must be associated with the spoke subnet. Option D is correct because the firewall must be configured to allow or deny outbound traffic. Option A is wrong because VNet peering is already in place; no additional peering is needed. Option C is wrong because Azure Firewall doesn't require a public IP for outbound inspection if using private IP; also NAT rules are for inbound. Option E is wrong because forced tunneling is a different concept; the route table handles this.
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.
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