Microsoft Azure Architect Design (AZ-301) Practice Exam

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Which Azure service should be used to protect an API from overuse by enabling rate limiting?

Azure API Management
Azure Logic Apps
Azure Functions
Azure App Service

The correct answer is: Azure API Management

Azure API Management is specifically designed to manage, publish, secure, and monitor APIs. One of its key features is the ability to implement rate limiting, which helps protect APIs from excessive calls that can lead to overuse or abuse. By setting quotas and rate limits, you can control how often clients can call your API, ensuring that resources are allocated efficiently, and the performance remains stable. This service provides developers with tools to manage API usage effectively, including analytics on API consumption, which is critical for understanding traffic patterns. The other services listed do not provide built-in functionality for directly managing API request rates in the same manner. Azure Logic Apps is focused on integrating services and automating workflows; Azure Functions is designed for serverless computing to run code without worrying about the underlying infrastructure; Azure App Service is a platform for hosting web applications and APIs but does not provide the API-specific management features that Azure API Management offers. Therefore, for robust API protection and management, Azure API Management is unquestionably the best choice.