Question 215 of 881
Call Private APIs from Azure App Service Using Regional VNet Integration
A IoT command API runs in Azure App Service and must call a private API hosted inside a virtual network. Which feature allows outbound access from the app to the VNet?
Quick Answer
The answer is Regional VNet integration. This feature is the correct choice because it allows an Azure App Service app to make outbound calls to resources inside a virtual network by injecting the app’s traffic into a delegated subnet, enabling secure access to private APIs without exposing them to the public internet. On the Microsoft Azure Developer Associate AZ-204 exam, this scenario tests your understanding of hybrid connectivity and network isolation, often appearing as a distractor against Service Endpoints or Private Endpoints—remember that Regional VNet integration handles outbound traffic from the app, while Private Endpoints handle inbound traffic to the app. A common trap is confusing it with Gateway-required VNet integration, which is legacy and used for on-premises connections. Memory tip: think “Regional for outbound reach, Private for inbound breach.”
⚠ Common exam trap
A common mix-up: candidates confuse Private Endpoint (inbound) with VNet integration (outbound), mistakenly thinking a Private Endpoint on the app allows it to call VNet resources, when in fact it only allows VNet resources to call the app.
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
✓
Regional VNet integration
Regional VNet integration enables an Azure App Service app to make outbound calls to resources in a virtual network (VNet) using the app's outbound IP addresses. It works by injecting the app's outbound traffic into the VNet via a delegated subnet, allowing the app to reach private APIs hosted inside the VNet without exposing them to the public internet.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Regional VNet integration
Why this is correct
Regional VNet integration enables App Service outbound connectivity to resources in a virtual network.
- ✗
Azure CDN custom domain
Why it's wrong here
CDN accelerates content delivery and does not provide VNet connectivity.
- ✗
Application Gateway path routing
Why it's wrong here
Application Gateway routes inbound traffic and does not give the app outbound VNet access.
- ✗
Private Endpoint for the web app only
Why it's wrong here
A Private Endpoint provides private inbound access to the web app, not outbound connectivity from it.
Visual reference
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Same concept, more angles
1 more way this is tested on AZ-204
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A image resize worker runs in Azure App Service and must call a private API hosted inside a virtual network. Which feature allows outbound access from the app to the VNet?
medium- ✓ A.Regional VNet integration
- B.Azure CDN custom domain
- C.Application Gateway path routing
- D.Private Endpoint for the web app only
Why A: Regional VNet integration enables an Azure App Service app to make outbound calls to resources in a virtual network (VNet) over the Microsoft backbone network. It uses a delegated subnet in the VNet to assign the app a network interface in the VNet, allowing it to reach private APIs without exposing them to the public internet.
Last reviewed: Jun 11, 2026
This AZ-204 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-204 exam.
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