- A
A load balancer frontend IP configuration in front of the gateway subnet.
Why wrong: A load balancer is not used to terminate Azure VPN gateway tunnels and does not satisfy the gateway public address requirement.
- B
A public IP address resource associated with the VPN gateway.
Azure VPN gateways require a public IP address resource so the on-premises VPN device can establish the tunnel to a known public endpoint. The gateway is deployed in GatewaySubnet, and the public IP is attached as part of the gateway configuration. Without that resource, the VPN gateway cannot be created successfully.
- C
A NAT gateway attached to GatewaySubnet.
Why wrong: A NAT gateway is for outbound internet translation from subnets, not for creating a VPN tunnel endpoint.
- D
A private endpoint for the virtual network gateway resource.
Why wrong: Private endpoints do not apply to VPN gateways and cannot replace the public endpoint required for S2S connectivity.
AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual networking. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 administrator is deploying a site-to-site VPN gateway in the Azure portal. The deployment fails validation because the gateway does not have a public-facing address to terminate the tunnel. What must be created and associated with the VPN gateway?
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
A public IP address resource associated with the VPN gateway.
A site-to-site VPN gateway in Azure requires a public IP address to terminate the IPSec tunnel from the on-premises device. The public IP address resource must be created and associated with the VPN gateway during deployment; without it, the gateway has no routable endpoint for the tunnel, causing validation to fail.
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.
- ✗
A load balancer frontend IP configuration in front of the gateway subnet.
Why it's wrong here
A load balancer is not used to terminate Azure VPN gateway tunnels and does not satisfy the gateway public address requirement.
- ✓
A public IP address resource associated with the VPN gateway.
Why this is correct
Azure VPN gateways require a public IP address resource so the on-premises VPN device can establish the tunnel to a known public endpoint. The gateway is deployed in GatewaySubnet, and the public IP is attached as part of the gateway configuration. Without that resource, the VPN gateway cannot be created successfully.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A NAT gateway attached to GatewaySubnet.
- ✗
A private endpoint for the virtual network gateway resource.
Why it's wrong here
Private endpoints do not apply to VPN gateways and cannot replace the public endpoint required for S2S connectivity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the public IP requirement with other networking components like load balancers or NAT gateways, mistakenly thinking those can provide the necessary public endpoint for VPN tunnel termination.
Detailed technical explanation
How to think about this question
Under the hood, the Azure VPN gateway uses the public IP address as the source and destination for IKE (Internet Key Exchange) and ESP (Encapsulating Security Payload) packets. The public IP must be of the 'Basic' SKU for VPN gateways (or 'Standard' with specific configurations) and must be assigned to the 'GatewaySubnet' via the gateway's IP configuration object. In a real-world scenario, if you deploy a VPN gateway without first creating a public IP, the deployment fails at validation because the gateway's network interface cannot be provisioned without a public-facing endpoint.
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.
What to study next
Got this wrong? Here's your next step.
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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: A public IP address resource associated with the VPN gateway. — A site-to-site VPN gateway in Azure requires a public IP address to terminate the IPSec tunnel from the on-premises device. The public IP address resource must be created and associated with the VPN gateway during deployment; without it, the gateway has no routable endpoint for the tunnel, causing validation to fail.
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 →
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Last reviewed: Jun 11, 2026
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