AZ-104 Implement and Manage Virtual Networking Practice Question
A hub VNet has a VPN gateway connected to on-premises networks. A new spoke VNet must reach on-premises resources through the existing hub gateway without deploying another gateway. What peering configuration should the administrator use?
⚠ Common exam trap
Watch out — candidates often confuse 'forwarded traffic' with 'gateway transit' — forwarded traffic only allows traffic to pass through a VNet (e.g., from a network virtual appliance), but it does not enable the use of a VPN gateway in the peered VNet, which requires the specific gateway transit setting.
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 gateway transit on the hub peering and use remote gateways on the spoke peering.
It enables the hub VNet's VPN gateway to be shared with the spoke VNet without deploying a separate gateway. 'Gateway transit' on the hub peering allows the hub to advertise routes from its VPN gateway to the spoke, while 'Use remote gateways' on the spoke peering allows the spoke to use the hub's gateway for outbound traffic to on-premises. This configuration ensures the spoke can reach on-premises resources through the hub's VPN tunnel.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable forwarded traffic on both peerings and create a route table in the spoke.
Why it's wrong here
Enabling Allow forwarded traffic on both peerings and adding a route table in the spoke is insufficient because that setting only permits traffic from the spoke to hop through network virtual appliances (NVAs) or similar devices in the hub; it does not tell the spoke to use the hub's VPN gateway. VPN gateways do not accept traffic routed to their private IP from a peering as a normal next-hop, and without the dedicated 'Use remote gateways' flag on the spoke peering (along with 'Allow gateway transit' on the hub), the spoke's routes will not learn or utilize the hub's on-premises routes. This approach can even create blackholing if the route table points to a non-existent appliance rather than the gateway.
When this WOULD be correct
This option would be correct in a scenario where the spoke VNet needs to route traffic through a hub VNet that is acting as a network virtual appliance (NVA) or firewall, not a VPN gateway. In that case, enabling forwarded traffic on both peerings and adding user-defined routes in the spoke is necessary to direct traffic to the NVA.
- ✓
Enable gateway transit on the hub peering and use remote gateways on the spoke peering.
Why this is correct
This is the standard configuration for letting a spoke VNet use an existing hub VPN gateway. The hub side must allow gateway transit, and the spoke side must be configured to use the remote gateway. Together, these settings let the spoke inherit on-premises connectivity through the hub without deploying a separate gateway.
- ✗
Deploy a private endpoint in the spoke for each on-premises subnet.
Why it's wrong here
Deploying private endpoints in the spoke for each on-premises subnet is invalid because private endpoints are designed to expose a specific Azure PaaS service (like Storage or SQL) via a private IP inside a VNet. They do not represent or connect to arbitrary on-premises networks, and they provide no routing or gateway function between VNets and external locations. On-premises subnets are neither PaaS resources nor consumer services that a private endpoint can target, so this approach cannot inherit the hub's VPN connectivity.
- ✗
Create a service endpoint on the spoke subnet for Microsoft.Network.
Why it's wrong here
Creating a service endpoint on the spoke subnet for Microsoft.Network is not a supported configuration and would not help: service endpoints are meant to extend a VNet's identity and private connectivity to PaaS services such as Storage or SQL, not to route traffic to on-premises. Even if a Microsoft.Network endpoint existed, it would only affect traffic to that service, leaving the spoke without any gateway route toward on-premises prefixes. Thus this action neither enables gateway transit nor provides a path through the hub VPN gateway.
When this WOULD be correct
A question asking how to securely access Azure Storage from a spoke VNet without using a public IP, where the storage account is in the hub VNet. In that case, a service endpoint on the spoke subnet for Microsoft.Storage would be correct.
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.
✓Enable gateway transit on the hub peering and use remote gateways on the spoke peering.Correct answer▾
Why this is correct
This is the standard configuration for letting a spoke VNet use an existing hub VPN gateway. The hub side must allow gateway transit, and the spoke side must be configured to use the remote gateway. Together, these settings let the spoke inherit on-premises connectivity through the hub without deploying a separate gateway.
✗Enable forwarded traffic on both peerings and create a route table in the spoke.Wrong answer — click to see why▾
Why this is wrong here
Option A is wrong because enabling forwarded traffic on both peerings and creating a route table in the spoke does not allow the spoke to use the hub's VPN gateway. The correct configuration requires enabling gateway transit on the hub side and using remote gateways on the spoke side.
★ When this WOULD be the correct answer
This option would be correct in a scenario where the spoke VNet needs to route traffic through a hub VNet that is acting as a network virtual appliance (NVA) or firewall, not a VPN gateway. In that case, enabling forwarded traffic on both peerings and adding user-defined routes in the spoke is necessary to direct traffic to the NVA.
Why candidates choose this
Candidates may confuse the need for route tables and forwarded traffic with gateway transit, thinking that creating routes manually can substitute for the gateway transit setting, or they may not fully understand the specific peering properties required for VPN gateway sharing.
✗Create a service endpoint on the spoke subnet for Microsoft.Network.Wrong answer — click to see why▾
Why this is wrong here
Service endpoints provide private connectivity to Azure services (like Azure Storage) from a VNet, not to on-premises networks via a VPN gateway. They do not enable routing through a hub gateway to on-premises resources.
★ When this WOULD be the correct answer
A question asking how to securely access Azure Storage from a spoke VNet without using a public IP, where the storage account is in the hub VNet. In that case, a service endpoint on the spoke subnet for Microsoft.Storage would be correct.
Why candidates choose this
Candidates may confuse service endpoints with VPN connectivity, thinking that 'Microsoft.Network' service endpoint provides general network connectivity to on-premises, when it actually only applies to Azure PaaS services.
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?”
Go deeper
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Learn chapter
VPN Gateway and ExpressRoute
Key term
VPN
A VPN (Virtual Private Network) creates a secure, encrypted tunnel between your device and a remote server, protecting your data and hiding your online activity.
Key term
VNet
A virtual private network inside a cloud provider that lets you securely connect and isolate your cloud resources.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.