AZ-204 Practice Question: Connect to and consume Azure services and third-party services
You need to expose an on-premises API securely to external partners without opening firewall ports. Which Azure service should you use?
⚠ Common exam trap
Many exam-takers confuse Azure API Management with Azure Application Gateway or Azure Front Door, thinking that any reverse proxy or load balancer can expose APIs securely, but they miss that API Management is the only service that provides full API lifecycle management, including developer portals, policies, and subscription keys, without requiring direct network access to the backend.
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
✓
Azure API Management
Azure API Management is the correct choice because it acts as a secure gateway for exposing on-premises APIs to external partners without opening firewall ports. It can connect to on-premises backends via a VPN or Azure ExpressRoute, and it handles authentication, throttling, and transformation at the gateway layer, keeping the internal network isolated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure Traffic Manager
Why it's wrong here
Azure Traffic Manager operates at the DNS level, directing client requests to different service endpoints based on various routing methods. It functions as a global DNS-based load balancer, primarily for distributing traffic across geographically dispersed services or for high availability. However, it does not provide the crucial API gateway functionalities required for securely exposing an on-premises API, such as authentication, authorization, rate limiting, policy enforcement, or content transformation, nor does it facilitate direct secure connectivity to an on-premises backend.
- ✓
Azure API Management
Why this is correct
Azure API Management is specifically designed to securely expose, publish, and manage APIs, including those hosted on-premises, to external consumers. It acts as a facade, providing a centralized gateway for all API traffic, enabling features like authentication, authorization, rate limiting, caching, request/response transformation, and a developer portal. Its ability to integrate with on-premises networks via VPN or ExpressRoute makes it the ideal solution for securely routing external requests to internal APIs.
- ✗
Azure Application Gateway
Why it's wrong here
Azure Application Gateway is a regional Layer 7 (HTTP/HTTPS) load balancer that provides features like URL-based routing, SSL termination, and a Web Application Firewall (WAF). While it can secure web traffic and route requests, it is primarily designed for load balancing and protecting web applications within an Azure region. It lacks the specific API management capabilities such as API versioning, subscription management, policy application (e.g., JWT validation, quota enforcement), and the direct secure hybrid connectivity features inherent in an API gateway for on-premises APIs.
- ✗
Azure Front Door
Why it's wrong here
Azure Front Door is a global, scalable entry-point that uses the Microsoft global edge network to create fast, secure, and widely scalable web applications. It offers global Layer 7 load balancing, WAF capabilities, and content delivery network (CDN) features. While it can route HTTP/HTTPS traffic globally and provide WAF protection, it is not an API gateway. It does not offer the granular API management features like policy enforcement, API transformation, subscription management, or a developer portal that are essential for securely exposing and managing APIs, especially those residing on-premises.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.