- A
Create peering only; the spoke will automatically use the hub gateway without extra settings.
Why wrong: Azure does not automatically let a spoke use the hub gateway. You must explicitly configure the peering permissions on both sides.
- B
Enable Use remote gateways on the hub peering and Allow gateway transit on the spoke peering.
Why wrong: These settings are reversed. The hub side must advertise gateway transit, and the spoke side must be allowed to use the remote gateway.
- C
Enable Allow gateway transit on the hub peering and Use remote gateways on the spoke peering.
In a hub-spoke design, the hub VNet that owns the VPN gateway must allow gateway transit, and the spoke must be configured to use the remote gateway. This lets the spoke route on-premises traffic through the hub without deploying its own gateway. The direction of these settings matters, and reversing them breaks the design.
- D
Create a service endpoint from the spoke VNet to the on-premises network.
Why wrong: Service endpoints are for Azure PaaS services, not for routing to an on-premises network through a VPN gateway.
AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual networking. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: gateway transit allows peered VNets to use a single VPN/ExpressRoute gateway.. 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 hub VNet already has a VPN gateway connected to on-premises. A spoke VNet in the same region must reach on-premises networks through that existing gateway, and you do not want to deploy a separate VPN gateway in the spoke. What peering settings should you use?
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
Enable Allow gateway transit on the hub peering and Use remote gateways on the spoke peering.
Option C is correct because to enable a spoke VNet to use a hub VNet's VPN gateway for on-premises connectivity without deploying a separate gateway, you must configure the hub peering with 'Allow gateway transit' and the spoke peering with 'Use remote gateways'. This allows the spoke to route traffic through the hub's VPN gateway, leveraging the existing site-to-site VPN connection to on-premises.
Key principle: Gateway transit allows peered VNets to use a single VPN/ExpressRoute gateway.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create peering only; the spoke will automatically use the hub gateway without extra settings.
Why it's wrong here
Azure does not automatically let a spoke use the hub gateway. You must explicitly configure the peering permissions on both sides.
- ✗
Enable Use remote gateways on the hub peering and Allow gateway transit on the spoke peering.
Why it's wrong here
These settings are reversed. The hub side must advertise gateway transit, and the spoke side must be allowed to use the remote gateway.
- ✓
Enable Allow gateway transit on the hub peering and Use remote gateways on the spoke peering.
Why this is correct
In a hub-spoke design, the hub VNet that owns the VPN gateway must allow gateway transit, and the spoke must be configured to use the remote gateway. This lets the spoke route on-premises traffic through the hub without deploying its own gateway. The direction of these settings matters, and reversing them breaks the design.
- ✗
Create a service endpoint from the spoke VNet to the on-premises network.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing which peering direction gets which setting: candidates often mistakenly enable 'Use remote gateways' on the hub side and 'Allow gateway transit' on the spoke side, which is the reverse of the correct configuration.
Detailed technical explanation
How to think about this question
Under the hood, VNet peering with gateway transit works by propagating routes from the hub's VPN gateway into the spoke's route table via BGP (if the VPN gateway is route-based) or static routes. The spoke's virtual machines use the hub gateway's private IP as the next hop for on-premises traffic. This setup requires that both VNets are in the same region and that the hub VNet does not already have a gateway transit enabled from another peered VNet (a transitive routing limitation).
KKey Concepts to Remember
- Gateway transit allows peered VNets to use a single VPN/ExpressRoute gateway.
- The VNet with the gateway (hub) must 'Allow gateway transit'.
- The VNet without the gateway (spoke) must 'Use remote gateways'.
- Gateway transit avoids deploying multiple VPN gateways, reducing cost and complexity.
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
Gateway transit allows peered VNets to use a single VPN/ExpressRoute gateway.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Review gateway transit allows peered VNets to use a single VPN/ExpressRoute gateway., then practise related AZ-104 questions on the same topic to reinforce the concept.
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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 — Gateway transit allows peered VNets to use a single VPN/ExpressRoute gateway..
What is the correct answer to this question?
The correct answer is: Enable Allow gateway transit on the hub peering and Use remote gateways on the spoke peering. — Option C is correct because to enable a spoke VNet to use a hub VNet's VPN gateway for on-premises connectivity without deploying a separate gateway, you must configure the hub peering with 'Allow gateway transit' and the spoke peering with 'Use remote gateways'. This allows the spoke to route traffic through the hub's VPN gateway, leveraging the existing site-to-site VPN connection to on-premises.
What should I do if I get this AZ-104 question wrong?
Review gateway transit allows peered VNets to use a single VPN/ExpressRoute gateway., then practise related AZ-104 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Gateway transit allows peered VNets to use a single VPN/ExpressRoute gateway.
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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.
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