The answer is Virtual appliance. This is the correct next hop type because a user-defined route (UDR) with destination 0.0.0.0/0 and next hop set to Virtual appliance forces all internet-bound traffic from the workload subnet to be forwarded to the NVA’s private IP at 10.1.0.4 for inspection, overriding Azure’s default system route that would otherwise send that traffic directly to the internet. On the AZ-104 exam, this scenario tests your understanding of custom routing and network virtual appliances—a common trap is selecting “Internet” as the next hop, which would bypass the NVA entirely. Remember, the Virtual appliance option is specifically designed for routing traffic through a third-party firewall or inspection device. A useful memory tip: think of “0.0.0.0/0” as the catch-all route, and “Virtual appliance” as the forced inspection gate—if you want traffic checked, never pick “Internet” for that destination.
AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual 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.
An operations team wants all internet-bound traffic from a workload subnet to pass through a network virtual appliance at 10.1.0.4 for inspection. Which next hop type should be used in a user-defined route for destination 0.0.0.0/0?
Why wrong: This would send traffic directly to the internet and bypass the inspection device. It does not support forced tunneling through an appliance.
B
Virtual appliance
Virtual appliance is the correct next hop when you want traffic sent to an NVA or firewall IP. Combined with a 0.0.0.0/0 route, it enables forced tunneling through the inspection device.
C
Virtual network gateway
Why wrong: A virtual network gateway is used for VPN or ExpressRoute paths, not for sending traffic to a standalone appliance inside the VNet.
D
None
Why wrong: None is used when traffic should be dropped, which is the opposite of the requirement. The team wants the traffic forwarded to an appliance.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Virtual appliance
To force all internet-bound traffic from a subnet through a network virtual appliance (NVA) at 10.1.0.4, you must create a user-defined route (UDR) with destination 0.0.0.0/0 and next hop type 'Virtual appliance'. This directs traffic to the NVA's private IP for inspection, overriding Azure's default system route that would otherwise send 0.0.0.0/0 traffic directly to the Internet via the Azure backbone.
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.
✗
Internet
Why it's wrong here
This would send traffic directly to the internet and bypass the inspection device. It does not support forced tunneling through an appliance.
✓
Virtual appliance
Why this is correct
Virtual appliance is the correct next hop when you want traffic sent to an NVA or firewall IP. Combined with a 0.0.0.0/0 route, it enables forced tunneling through the inspection device.
Related concept
Read the scenario before looking for a memorised answer.
✗
Virtual network gateway
Why it's wrong here
A virtual network gateway is used for VPN or ExpressRoute paths, not for sending traffic to a standalone appliance inside the VNet.
✗
None
Why it's wrong here
None is used when traffic should be dropped, which is the opposite of the requirement. The team wants the traffic forwarded to an appliance.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'Virtual appliance' with 'Virtual network gateway', mistakenly thinking a VPN gateway is required to route internet traffic, when in fact the NVA is a simple VM or firewall appliance with IP forwarding enabled.
Detailed technical explanation
How to think about this question
When you set next hop type to 'Virtual appliance', Azure creates a host route for 0.0.0.0/0 pointing to the specified private IP (10.1.0.4). The NVA must have IP forwarding enabled on its network interface and be configured to route traffic (e.g., via iptables or Windows Routing and Remote Access). Without IP forwarding, the NVA will drop packets even with the UDR in place. This pattern is commonly used for forced tunneling in hub-spoke topologies.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-104 question in full detail.
Implement and Manage Virtual Networking — This question tests Implement and Manage Virtual Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Virtual appliance — To force all internet-bound traffic from a subnet through a network virtual appliance (NVA) at 10.1.0.4, you must create a user-defined route (UDR) with destination 0.0.0.0/0 and next hop type 'Virtual appliance'. This directs traffic to the NVA's private IP for inspection, overriding Azure's default system route that would otherwise send 0.0.0.0/0 traffic directly to the Internet via the Azure backbone.
What should I do if I get this AZ-104 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.
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