Question

In cloud computing, what is the function of an API Gateway?

Q: Answer-In cloud computing, what is the function of an API Gateway?

An API Gateway is a managed service that serves as the single entry point for all API calls to backend services. It handles Authentication and Authorisation verifying API keys, OAuth tokens, JWT, Rate Limiting preventing API abuse by limiting calls per second, Request Routing directing calls to appropriate microservices, SSL Termination, Response Caching, Logging and Monitoring, and Protocol Translation. Examples include AWS API Gateway, Azure API Management, Kong, and Apigee.

A A physical device that connects cloud data centres to the public internet allowing users to connect to the required web application or internet services

B A cloud storage service that manages API documentation and versioning allowing users to connect to different versions of the application

C A managed service that acts as an entry point for APIs, handling authentication, rate limiting, routing, and monitoring of API requests

D A tool for converting legacy application interfaces to cloud-native REST APIs automatically

E A security tool that blocks all external API calls to cloud services

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