- A
Attach a Standard SKU public IP address with static allocation to the VPN gateway.
Azure VPN gateways require a public IP resource, and Standard static IPs are the supported choice.
- B
Attach a private IP address from the GatewaySubnet to the VPN gateway.
Why wrong: VPN gateways terminate site-to-site connections on a public IP, not only on a private address.
- C
Place the gateway behind an internal load balancer in the GatewaySubnet.
Why wrong: An internal load balancer is not how Azure VPN gateways receive on-premises encrypted tunnels.
- D
Create a NAT gateway and associate it with the GatewaySubnet.
Why wrong: A NAT gateway does not replace the public IP requirement for the VPN gateway service.
Question 602 of 1,170
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 an existing VNet. The GatewaySubnet already exists, but deployment validation fails because the gateway has no public-facing IP resource. Which configuration is required?
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
✓
Attach a Standard SKU public IP address with static allocation to the VPN gateway.
A site-to-site VPN gateway in Azure requires a public IP address to establish connectivity with the on-premises VPN device. The Standard SKU public IP with static allocation is required because VPN gateways do not support Basic SKU public IPs and must have a static IP that does not change. Without this public IP resource, the gateway cannot be provisioned as it has no public endpoint for the VPN tunnel.
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.
- ✓
Attach a Standard SKU public IP address with static allocation to the VPN gateway.
- ✗
Attach a private IP address from the GatewaySubnet to the VPN gateway.
Why it's wrong here
VPN gateways terminate site-to-site connections on a public IP, not only on a private address.
- ✗
Place the gateway behind an internal load balancer in the GatewaySubnet.
Why it's wrong here
An internal load balancer is not how Azure VPN gateways receive on-premises encrypted tunnels.
When this WOULD be correct
When deploying an internal load balancer for a backend service within a VNet, placing it in the GatewaySubnet is incorrect; however, an internal load balancer is correct for scenarios requiring private load balancing of application traffic within a VNet, such as a multi-tier web application.
- ✗
Create a NAT gateway and associate it with the GatewaySubnet.
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.
✓Attach a Standard SKU public IP address with static allocation to the VPN gateway.Correct answer▾
Why this is correct
Azure VPN gateways require a public IP resource, and Standard static IPs are the supported choice.
✗Attach a private IP address from the GatewaySubnet to the VPN gateway.Wrong answer — click to see why▾
Why this is wrong here
A VPN gateway requires a public IP address for site-to-site connectivity; a private IP from the GatewaySubnet cannot provide the necessary public endpoint for the VPN tunnel.
★ When this WOULD be the correct answer
This option would be correct if the question asked about configuring a point-to-site VPN or a Virtual Network Gateway that only needs internal connectivity, such as for a private VPN connection between VNets using ExpressRoute with private peering.
Why candidates choose this
Candidates may confuse the GatewaySubnet's purpose with internal routing, thinking a private IP is sufficient for gateway operations, or they may overlook the public-facing requirement of a site-to-site VPN.
✗Place the gateway behind an internal load balancer in the GatewaySubnet.Wrong answer — click to see why▾
Why this is wrong here
A VPN gateway requires a public IP address for site-to-site connectivity; an internal load balancer provides only private IP addressing and cannot be used for VPN gateway traffic.
★ When this WOULD be the correct answer
When deploying an internal load balancer for a backend service within a VNet, placing it in the GatewaySubnet is incorrect; however, an internal load balancer is correct for scenarios requiring private load balancing of application traffic within a VNet, such as a multi-tier web application.
Why candidates choose this
Candidates may confuse the need for high availability or traffic distribution with load balancing, mistakenly thinking an internal load balancer can replace the public IP requirement for VPN gateways.
✗Create a NAT gateway and associate it with the GatewaySubnet.Wrong answer — click to see why▾
Why this is wrong here
A NAT gateway is used for outbound internet connectivity from private subnets, not for providing a public IP to a VPN gateway. VPN gateways require a public IP address attached directly to the gateway resource, not a NAT gateway.
★ When this WOULD be the correct answer
In a scenario where an administrator needs to enable outbound internet access for resources in a private subnet (e.g., to download updates) while blocking inbound traffic, associating a NAT gateway with the subnet would be the correct solution.
Why candidates choose this
Candidates may confuse NAT gateways with providing public IP functionality, or think that a NAT gateway can replace the need for a public IP on the VPN gateway for site-to-site connectivity.
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 private IP from the GatewaySubnet is sufficient for a site-to-site VPN, overlooking that the VPN gateway must have a public IP to terminate the IPsec tunnel from the on-premises device.
Detailed technical explanation
How to think about this question
Azure VPN gateways use a public IP address as the tunnel endpoint for IPsec/IKE (IKEv1/IKEv2) connections. The Standard SKU public IP supports the required static allocation and availability zones, whereas Basic SKU does not support zone-resiliency for VPN gateways. Additionally, the GatewaySubnet must have a minimum size of /27 to accommodate the gateway instances and future scaling.
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: Attach a Standard SKU public IP address with static allocation to the VPN gateway. — A site-to-site VPN gateway in Azure requires a public IP address to establish connectivity with the on-premises VPN device. The Standard SKU public IP with static allocation is required because VPN gateways do not support Basic SKU public IPs and must have a static IP that does not change. Without this public IP resource, the gateway cannot be provisioned as it has no public endpoint for the VPN tunnel.
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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