- A
Disable the subnet's network security group so the NAT gateway can take effect.
Why wrong: NSGs control filtering, not route selection. Removing an NSG would not change which next hop is chosen for internet traffic.
- B
Remove the 0.0.0.0/0 user-defined route from the subnet route table.
A default UDR to a virtual appliance overrides the system default route, so the NAT gateway never becomes the effective internet egress path. Removing that default route restores normal outbound routing, and the NAT gateway can then provide the public source IP for internet-bound traffic. More specific UDRs for private prefixes can remain in place.
- C
Enable gateway route propagation on the route table.
Why wrong: Gateway route propagation is for routes learned through a VPN or ExpressRoute gateway. It does not override a specific 0.0.0.0/0 UDR already sending traffic to a virtual appliance.
- D
Attach a public IP address to each virtual machine NIC.
Why wrong: Individual public IPs would bypass the desired NAT gateway design and are operationally harder to manage. They also do not fix the existing route precedence issue.
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 outbound traffic from the VMs still leaves through a network virtual appliance because the subnet has a user-defined route for 0.0.0.0/0 with next hop type Virtual appliance. The workload must use the NAT gateway for internet-bound traffic while keeping more specific routes intact. 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 route table.
The NAT gateway is designed to provide outbound connectivity for VMs in the subnet, but a user-defined route (UDR) for 0.0.0.0/0 with next hop type Virtual appliance overrides the default route to the NAT gateway. By removing that UDR, the subnet's default route reverts to the system route, which directs internet-bound traffic to the NAT gateway's public IP. More specific routes (e.g., to on-premises networks) remain intact because they are not affected by the removal of the 0.0.0.0/0 route.
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.
- ✗
Disable the subnet's network security group so the NAT gateway can take effect.
Why it's wrong here
NSGs control filtering, not route selection. Removing an NSG would not change which next hop is chosen for internet traffic.
- ✓
Remove the 0.0.0.0/0 user-defined route from the subnet route table.
Why this is correct
A default UDR to a virtual appliance overrides the system default route, so the NAT gateway never becomes the effective internet egress path. Removing that default route restores normal outbound routing, and the NAT gateway can then provide the public source IP for internet-bound traffic. More specific UDRs for private prefixes can remain in place.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable gateway route propagation on the route table.
- ✗
Attach a public IP address to each virtual machine NIC.
Why it's wrong here
Individual public IPs would bypass the desired NAT gateway design and are operationally harder to manage. They also do not fix the existing route precedence issue.
When this WOULD be correct
In a scenario where a VM needs direct outbound internet access without going through a NAT gateway or virtual appliance, and the subnet has no conflicting routes, attaching a public IP to the NIC would be correct. For example, if the requirement is to allow a specific VM to have its own public IP for inbound connections while other VMs use a NAT gateway.
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 route table.Correct answer▾
Why this is correct
A default UDR to a virtual appliance overrides the system default route, so the NAT gateway never becomes the effective internet egress path. Removing that default route restores normal outbound routing, and the NAT gateway can then provide the public source IP for internet-bound traffic. More specific UDRs for private prefixes can remain in place.
✗Disable the subnet's network security group so the NAT gateway can take effect.Wrong answer — click to see why▾
Why this is wrong here
Disabling the network security group does not affect routing; the NAT gateway is bypassed because the 0.0.0.0/0 UDR with next hop Virtual Appliance overrides the default route to the NAT gateway. NSGs control traffic filtering, not routing.
★ When this WOULD be the correct answer
If a subnet's NSG is blocking outbound traffic that should be allowed through a NAT gateway, and the routing is correctly configured to use the NAT gateway, then disabling or modifying the NSG rules could resolve connectivity issues.
Why candidates choose this
Candidates may confuse the roles of NSGs and route tables, thinking that NSGs can override routing decisions or that disabling security will force traffic through the NAT gateway.
✗Enable gateway route propagation on the route table.Wrong answer — click to see why▾
Why this is wrong here
Enabling gateway route propagation adds routes from a VPN gateway or ExpressRoute to the route table, but it does not override the existing 0.0.0.0/0 UDR. The NAT gateway still cannot take effect because the UDR with next hop Virtual appliance remains the preferred route for internet-bound traffic.
★ When this WOULD be the correct answer
In a scenario where a subnet needs to learn on-premises routes via a VPN gateway or ExpressRoute, and the route table does not have a conflicting 0.0.0.0/0 UDR, enabling gateway route propagation would allow those routes to be added automatically.
Why candidates choose this
Candidates may think that enabling route propagation will allow the NAT gateway's default route to be learned or that it will override the UDR, misunderstanding that gateway propagation only adds routes from a gateway and does not remove existing UDRs.
✗Attach a public IP address to each virtual machine NIC.Wrong answer — click to see why▾
Why this is wrong here
Attaching a public IP to each VM NIC would bypass the NAT gateway and the network virtual appliance, but the requirement is to use the NAT gateway for internet-bound traffic while keeping more specific routes intact. This option does not address the conflicting 0.0.0.0/0 route that directs traffic to the virtual appliance.
★ When this WOULD be the correct answer
In a scenario where a VM needs direct outbound internet access without going through a NAT gateway or virtual appliance, and the subnet has no conflicting routes, attaching a public IP to the NIC would be correct. For example, if the requirement is to allow a specific VM to have its own public IP for inbound connections while other VMs use a NAT gateway.
Why candidates choose this
Candidates may think that giving each VM a public IP is a straightforward way to enable outbound internet access, overlooking that the existing route table still overrides the NAT gateway and that the question explicitly requires using the NAT gateway.
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 a NAT gateway requires a UDR to function, when in fact the NAT gateway works via the system default route and a UDR for 0.0.0.0/0 with a different next hop type will override it, breaking the NAT gateway's intended behavior.
Detailed technical explanation
How to think about this question
Azure uses a longest-prefix-match routing algorithm; a 0.0.0.0/0 UDR with next hop Virtual appliance has a shorter prefix length than any more specific route (e.g., 10.0.0.0/16), so it only affects traffic not matching a more specific route. The NAT gateway automatically creates a system default route for 0.0.0.0/0 with next hop 'Internet', but a UDR with the same prefix takes precedence (user-defined routes override system routes). In a real-world scenario, an organization might use a firewall NVA for inspecting traffic to on-premises or peered networks while using a NAT gateway for direct internet access to reduce latency and cost.
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 user-defined route from the subnet route table. — The NAT gateway is designed to provide outbound connectivity for VMs in the subnet, but a user-defined route (UDR) for 0.0.0.0/0 with next hop type Virtual appliance overrides the default route to the NAT gateway. By removing that UDR, the subnet's default route reverts to the system route, which directs internet-bound traffic to the NAT gateway's public IP. More specific routes (e.g., to on-premises networks) remain intact because they are not affected by the removal of the 0.0.0.0/0 route.
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.