- A
Keep the default route to the virtual appliance and add the NAT gateway to the subnet.
Why wrong: A user-defined default route will still take precedence for internet traffic, so the NAT gateway would not become the effective egress path.
- B
Remove the 0.0.0.0/0 UDR and associate the NAT gateway with the subnet.
NAT gateway is used for outbound internet traffic when the subnet does not already force that traffic elsewhere. Because the 0.0.0.0/0 UDR sends all internet-bound packets to the virtual appliance, NAT gateway cannot provide the source IP. Removing the UDR allows the subnet to use the NAT gateway for outbound connectivity as intended.
- C
Change the route next hop to Virtual network gateway.
Why wrong: A virtual network gateway is for hybrid connectivity, not internet egress through a NAT gateway, so this would not meet the requirement.
- D
Create an NSG outbound rule that allows internet traffic from the subnet.
Why wrong: NSGs can allow or deny traffic, but they do not determine the public source IP used for outbound internet connections.
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 has a route table with a 0.0.0.0/0 user-defined route to an on-premises virtual appliance. The business now wants Azure VM outbound internet traffic to use a NAT gateway so the public source IP stays consistent, and the firewall appliance is no longer required for internet egress. What should the administrator do?
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 UDR and associate the NAT gateway with the subnet.
Option B is correct because removing the 0.0.0.0/0 user-defined route (UDR) that points to the on-premises virtual appliance and associating a NAT gateway with the subnet ensures that all outbound internet traffic from Azure VMs uses the NAT gateway's public IP address. The NAT gateway automatically creates a default route (0.0.0.0/0) with a next hop type of 'Internet' for the subnet, overriding any conflicting UDRs. This provides a consistent source IP for internet egress without requiring the firewall appliance.
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.
- ✗
Keep the default route to the virtual appliance and add the NAT gateway to the subnet.
Why it's wrong here
A user-defined default route will still take precedence for internet traffic, so the NAT gateway would not become the effective egress path.
When this WOULD be correct
If the business still required the firewall appliance for inspection or logging of internet traffic, but also needed a consistent public IP for outbound traffic, you would keep the UDR to the appliance and add the NAT gateway to the subnet (though this setup is not supported by Azure NAT gateway).
- ✓
Remove the 0.0.0.0/0 UDR and associate the NAT gateway with the subnet.
Why this is correct
NAT gateway is used for outbound internet traffic when the subnet does not already force that traffic elsewhere. Because the 0.0.0.0/0 UDR sends all internet-bound packets to the virtual appliance, NAT gateway cannot provide the source IP. Removing the UDR allows the subnet to use the NAT gateway for outbound connectivity as intended.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Change the route next hop to Virtual network gateway.
Why it's wrong here
A virtual network gateway is for hybrid connectivity, not internet egress through a NAT gateway, so this would not meet the requirement.
When this WOULD be correct
This option would be correct if the requirement was to route internet-bound traffic through a VPN gateway for inspection or to connect to on-premises resources, and the NAT gateway was not needed. For example, if the business wanted to force all internet traffic through a site-to-site VPN to a central inspection point.
- ✗
Create an NSG outbound rule that allows internet traffic from the subnet.
Why it's wrong here
NSGs can allow or deny traffic, but they do not determine the public source IP used for outbound internet connections.
When this WOULD be correct
If the question asked how to allow internet outbound traffic from a subnet while still using the on-premises firewall for inspection, an NSG outbound rule could be used to permit the traffic, but the route would still direct it to the firewall.
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 UDR and associate the NAT gateway with the subnet.Correct answer▾
Why this is correct
NAT gateway is used for outbound internet traffic when the subnet does not already force that traffic elsewhere. Because the 0.0.0.0/0 UDR sends all internet-bound packets to the virtual appliance, NAT gateway cannot provide the source IP. Removing the UDR allows the subnet to use the NAT gateway for outbound connectivity as intended.
✗Keep the default route to the virtual appliance and add the NAT gateway to the subnet.Wrong answer — click to see why▾
Why this is wrong here
Keeping the 0.0.0.0/0 UDR to the virtual appliance forces internet traffic through the appliance, bypassing the NAT gateway. The NAT gateway requires the subnet's default route to be 0.0.0.0/0 with next hop 'Internet' to handle outbound traffic directly.
★ When this WOULD be the correct answer
If the business still required the firewall appliance for inspection or logging of internet traffic, but also needed a consistent public IP for outbound traffic, you would keep the UDR to the appliance and add the NAT gateway to the subnet (though this setup is not supported by Azure NAT gateway).
Why candidates choose this
Candidates may think the NAT gateway can coexist with the existing UDR, assuming the NAT gateway overrides the route, but in reality the UDR takes precedence and traffic still goes to the appliance.
✗Change the route next hop to Virtual network gateway.Wrong answer — click to see why▾
Why this is wrong here
Changing the route next hop to Virtual network gateway would route traffic to a VPN gateway or ExpressRoute gateway, which does not provide NAT gateway functionality for consistent public IP. The NAT gateway must be associated with the subnet, and the UDR to the appliance must be removed to allow direct internet egress.
★ When this WOULD be the correct answer
This option would be correct if the requirement was to route internet-bound traffic through a VPN gateway for inspection or to connect to on-premises resources, and the NAT gateway was not needed. For example, if the business wanted to force all internet traffic through a site-to-site VPN to a central inspection point.
Why candidates choose this
Candidates may think that changing the next hop to a virtual network gateway is a way to route traffic through a gateway that can provide NAT, but they confuse Virtual network gateway with NAT gateway. They also may not understand that NAT gateway requires subnet association and removal of conflicting UDRs.
✗Create an NSG outbound rule that allows internet traffic from the subnet.Wrong answer — click to see why▾
Why this is wrong here
An NSG outbound rule allows traffic but does not provide a consistent public source IP; NAT gateway is required for that. The NSG cannot replace the route table change needed to bypass the virtual appliance.
★ When this WOULD be the correct answer
If the question asked how to allow internet outbound traffic from a subnet while still using the on-premises firewall for inspection, an NSG outbound rule could be used to permit the traffic, but the route would still direct it to the firewall.
Why candidates choose this
Candidates may think NSGs control outbound internet access and assume adding an allow rule is sufficient, overlooking that routing and source NAT are separate concerns.
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 may think a NAT gateway can coexist with a conflicting UDR (Option A) or that changing the next hop to a virtual network gateway (Option C) will provide internet egress, when in fact the UDR must be removed to allow the NAT gateway's default route to take effect.
Detailed technical explanation
How to think about this question
When a NAT gateway is associated with a subnet, Azure automatically adds a default route (0.0.0.0/0) with a next hop type of 'Internet' for that subnet, which takes precedence over any user-defined routes with the same prefix due to the order of route evaluation (system routes, then UDRs, then BGP routes). However, if a UDR with 0.0.0.0/0 already exists, it will override the NAT gateway's default route unless the UDR is removed. In real-world scenarios, this is critical when migrating from a forced-tunneling or firewall-based egress to a NAT gateway, as failing to remove the UDR will cause traffic to continue flowing through the appliance, defeating the purpose of the NAT gateway.
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Implement and Manage Virtual Networking — study guide chapter
Learn the concepts, then practise the questions
- →
Implement and Manage Virtual Networking practice questions
Targeted practice on this topic area only
- →
All AZ-104 questions
1,170 questions across all exam domains
- →
AZ-104 study guide
Full concept coverage aligned to exam objectives
- →
AZ-104 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related AZ-104 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Manage Azure Identities and Governance practice questions
Practise AZ-104 questions linked to Manage Azure Identities and Governance.
Implement and Manage Storage practice questions
Practise AZ-104 questions linked to Implement and Manage Storage.
Deploy and Manage Azure Compute practice questions
Practise AZ-104 questions linked to Deploy and Manage Azure Compute.
Implement and Manage Virtual Networking practice questions
Practise AZ-104 questions linked to Implement and Manage Virtual Networking.
Monitor and Maintain Azure Resources practice questions
Practise AZ-104 questions linked to Monitor and Maintain Azure Resources.
AZ-104 Azure RBAC practice questions
Practise AZ-104 questions linked to AZ-104 Azure RBAC.
AZ-104 storage account practice questions
Practise AZ-104 questions linked to AZ-104 storage account.
AZ-104 virtual network practice questions
Practise AZ-104 questions linked to AZ-104 virtual network.
AZ-104 NSG practice questions
Practise AZ-104 questions linked to AZ-104 NSG.
AZ-104 Azure Monitor practice questions
Practise AZ-104 questions linked to AZ-104 Azure Monitor.
AZ-104 backup practice questions
Practise AZ-104 questions linked to AZ-104 backup.
AZ-104 managed identity practice questions
Practise AZ-104 questions linked to AZ-104 managed identity.
Practice this exam
Start a free AZ-104 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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 UDR and associate the NAT gateway with the subnet. — Option B is correct because removing the 0.0.0.0/0 user-defined route (UDR) that points to the on-premises virtual appliance and associating a NAT gateway with the subnet ensures that all outbound internet traffic from Azure VMs uses the NAT gateway's public IP address. The NAT gateway automatically creates a default route (0.0.0.0/0) with a next hop type of 'Internet' for the subnet, overriding any conflicting UDRs. This provides a consistent source IP for internet egress without requiring the firewall appliance.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More AZ-104 practice questions
- A storage automation service principal must upload, read, and delete blob data in one container by using Microsoft Entra…
- A subnet contains several application servers. You need to allow inbound TCP 3389 only from a management subnet named Su…
- A subscription admin wants to investigate who changed a resource and also review the platform-generated events for that…
- Based on the exhibit, which Azure feature should the administrator use to track this kind of platform-wide service issue…
- An administrator wants a script running on an Azure VM to create a resource in Azure without storing any passwords or cl…
- A PowerShell script runs on an Azure VM every night and uses Azure CLI commands to create tags and VM resources in anoth…
Last reviewed: Jun 11, 2026
This AZ-104 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-104 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.