- A
Add a public IP address directly to each virtual machine NIC.
Why wrong: Per-VM public IPs do not provide a single shared outbound address for the entire subnet.
- B
Remove the 0.0.0.0/0 user-defined route from the subnet.
The default route to the virtual appliance forces all internet-bound traffic away from the subnet's NAT gateway. Because NAT gateway only handles outbound traffic that is not sent to another next hop, the UDR prevents the NAT gateway from being used. Removing the default route allows the subnet to use the NAT gateway's static public IP for outbound internet connections while keeping routing simple.
- C
Enable service endpoints for the subnet.
Why wrong: Service endpoints improve access to supported Azure services, but they do not provide a subnet-wide public outbound IP.
- D
Change the NAT gateway to a zone-redundant SKU.
Why wrong: NAT gateway does not use a zone-redundant SKU to solve routing precedence or outbound IP selection.
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.
A subnet is associated with a NAT gateway, but its route table also contains a 0.0.0.0/0 route to a virtual appliance at 10.2.0.4. The business wants all outbound internet traffic from the VMs to use one static public IP, and inspection by the appliance is no longer required. What should the administrator change?
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
Remove the 0.0.0.0/0 user-defined route from the subnet.
The correct answer is B because removing the 0.0.0.0/0 user-defined route (UDR) from the subnet's route table will allow the NAT gateway to handle all outbound internet traffic. The NAT gateway provides a single static public IP for outbound traffic, and since inspection by the virtual appliance is no longer required, the conflicting UDR that directs traffic to the appliance must be deleted. This ensures that the subnet's default route points to the NAT gateway, which uses Source Network Address Translation (SNAT) to translate private IPs to the static public IP.
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.
- ✗
Add a public IP address directly to each virtual machine NIC.
- ✓
Remove the 0.0.0.0/0 user-defined route from the subnet.
Why this is correct
The default route to the virtual appliance forces all internet-bound traffic away from the subnet's NAT gateway. Because NAT gateway only handles outbound traffic that is not sent to another next hop, the UDR prevents the NAT gateway from being used. Removing the default route allows the subnet to use the NAT gateway's static public IP for outbound internet connections while keeping routing simple.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable service endpoints for the subnet.
Why it's wrong here
Service endpoints improve access to supported Azure services, but they do not provide a subnet-wide public outbound IP.
When this WOULD be correct
In a scenario where a subnet needs to securely access Azure Storage or SQL Database without going through the internet or a virtual appliance, enabling service endpoints would be the correct answer. For example, if the question asked 'How to ensure VMs in a subnet connect to Azure Storage using the Azure backbone network instead of the internet?'
- ✗
Change the NAT gateway to a zone-redundant SKU.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓Remove the 0.0.0.0/0 user-defined route from the subnet.Correct answer▾
Why this is correct
The default route to the virtual appliance forces all internet-bound traffic away from the subnet's NAT gateway. Because NAT gateway only handles outbound traffic that is not sent to another next hop, the UDR prevents the NAT gateway from being used. Removing the default route allows the subnet to use the NAT gateway's static public IP for outbound internet connections while keeping routing simple.
✗Add a public IP address directly to each virtual machine NIC.Wrong answer — click to see why▾
Why this is wrong here
Adding a public IP directly to each VM NIC would bypass the NAT gateway, causing each VM to use its own public IP instead of the single static public IP required by the business.
★ When this WOULD be the correct answer
This would be correct if the requirement was for each VM to have its own public IP for direct outbound connectivity, and no centralized public IP or NAT gateway was needed.
Why candidates choose this
Candidates may think that assigning a public IP to each VM is a straightforward way to provide internet access, without understanding that it conflicts with the NAT gateway's purpose of using a single static IP.
✗Enable service endpoints for the subnet.Wrong answer — click to see why▾
Why this is wrong here
Enabling service endpoints does not affect outbound internet traffic routing; it only allows direct private access to Azure PaaS services from the subnet, bypassing the internet. The requirement is to remove the appliance inspection and use a NAT gateway for internet traffic, which is achieved by removing the conflicting UDR.
★ When this WOULD be the correct answer
In a scenario where a subnet needs to securely access Azure Storage or SQL Database without going through the internet or a virtual appliance, enabling service endpoints would be the correct answer. For example, if the question asked 'How to ensure VMs in a subnet connect to Azure Storage using the Azure backbone network instead of the internet?'
Why candidates choose this
Candidates may confuse service endpoints with a method to control outbound internet traffic, thinking they can replace a NAT gateway or virtual appliance for internet access, when service endpoints are specifically for Azure PaaS services only.
✗Change the NAT gateway to a zone-redundant SKU.Wrong answer — click to see why▾
Why this is wrong here
The question requires all outbound traffic to use one static public IP and no longer needs appliance inspection. Changing the NAT gateway to a zone-redundant SKU does not affect routing; it only provides high availability across availability zones, which is irrelevant to the stated requirements.
★ When this WOULD be the correct answer
An administrator needs to ensure NAT gateway availability during an availability zone failure. The question would specify that the NAT gateway is currently in a single zone and must tolerate zone outages, making zone-redundant SKU the correct choice.
Why candidates choose this
Candidates may think a zone-redundant SKU is necessary for high availability or performance, but the question's focus is on routing and public IP consolidation, not redundancy.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think adding a public IP to VMs (Option A) is simpler or that service endpoints (Option C) can replace a NAT gateway for general internet access, but they fail to recognize that the existing UDR is the direct conflict preventing the NAT gateway from being the default route for outbound traffic.
Detailed technical explanation
How to think about this question
Under the hood, a NAT gateway uses SNAT to map VM private IPs to its public IP(s) for outbound traffic, and it requires the subnet's effective route for 0.0.0.0/0 to be the default Azure route (Next Hop Type: Internet) or the NAT gateway itself. A user-defined route with a higher priority (e.g., Next Hop: Virtual Appliance) overrides this, causing traffic to bypass the NAT gateway. In real-world scenarios, this is common after migrating from a third-party firewall to Azure NAT Gateway, where failing to remove the old UDR leads to asymmetric routing or dropped connections.
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 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.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this AZ-104 question test?
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: Remove the 0.0.0.0/0 user-defined route from the subnet. — The correct answer is B because removing the 0.0.0.0/0 user-defined route (UDR) from the subnet's route table will allow the NAT gateway to handle all outbound internet traffic. The NAT gateway provides a single static public IP for outbound traffic, and since inspection by the virtual appliance is no longer required, the conflicting UDR that directs traffic to the appliance must be deleted. This ensures that the subnet's default route points to the NAT gateway, which uses Source Network Address Translation (SNAT) to translate private IPs to the static public IP.
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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Last reviewed: Jun 11, 2026
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