- A
Add a user-defined route (UDR) to the gateway subnet of VNet2 with destination 0.0.0.0/0 and next hop set to the private IP of the NVA in VNet1.
A UDR on VNet2's gateway subnet can redirect all internet-bound or on-premises traffic to the NVA via VNet peering, ensuring inspection.
- B
Configure Azure Route Server on VNet1 and enable VNet peering between VNet1 and VNet2.
Why wrong: Azure Route Server exchanges routes but does not force traffic through the NVA; VNet peering alone does not redirect traffic.
- C
Create a forced tunneling configuration on the VPN gateway to send all traffic to the NVA.
Why wrong: Forced tunneling on the VPN gateway sends traffic from the VPN to an inspection point, but it does not affect traffic between VNets.
- D
Peer VNet1 and VNet2 and use Azure Firewall in VNet1 as the next hop for all traffic.
Why wrong: The scenario specifies an NVA, not Azure Firewall; using Azure Firewall would require a different configuration.
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 on-premises network is connected to Azure via a Site-to-Site VPN. You have a production virtual network (VNet1) and a development VNet (VNet2) in the same region. VNet1 has a network virtual appliance (NVA) from the Azure Marketplace. You need to ensure that traffic from VNet2 to an on-premises server is inspected by the NVA in VNet1. Which routing configuration should you implement?
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
Add a user-defined route (UDR) to the gateway subnet of VNet2 with destination 0.0.0.0/0 and next hop set to the private IP of the NVA in VNet1.
Option C is correct because user-defined routes (UDRs) with the NVA as next hop are needed to redirect traffic. Forcing tunnel via Azure Firewall is not specified, and Azure Route Server doesn't force traffic through an NVA. VPN gateway can't forward to NVA directly.
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.
- ✓
Add a user-defined route (UDR) to the gateway subnet of VNet2 with destination 0.0.0.0/0 and next hop set to the private IP of the NVA in VNet1.
- ✗
Configure Azure Route Server on VNet1 and enable VNet peering between VNet1 and VNet2.
Why it's wrong here
Azure Route Server exchanges routes but does not force traffic through the NVA; VNet peering alone does not redirect traffic.
- ✗
Create a forced tunneling configuration on the VPN gateway to send all traffic to the NVA.
- ✗
Peer VNet1 and VNet2 and use Azure Firewall in VNet1 as the next hop for all traffic.
Why it's wrong here
The scenario specifies an NVA, not Azure Firewall; using Azure Firewall would require a different configuration.
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.
Trap categories for this question
Scenario analysis trap
The scenario specifies an NVA, not Azure Firewall; using Azure Firewall would require a different configuration.
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 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.
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.
- →
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Learn the concepts, then practise the questions
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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: Add a user-defined route (UDR) to the gateway subnet of VNet2 with destination 0.0.0.0/0 and next hop set to the private IP of the NVA in VNet1. — Option C is correct because user-defined routes (UDRs) with the NVA as next hop are needed to redirect traffic. Forcing tunnel via Azure Firewall is not specified, and Azure Route Server doesn't force traffic through an NVA. VPN gateway can't forward to NVA directly.
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 20, 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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