How are API keys used to enforce rate limiting?

The correct answer is D. to uniquely identify each client application. API keys uniquely identify each client application. The API gateway or server tracks requests per key and applies rate limits (for example, max requests per minute per key), which is how rate limiting is enforced.

Submitted by tarun92· Mar 5, 2026

Question

Options

Ato specify the type of data format the client prefers to receive
Bto encrypt data sent in the API request
Cto define the network path the API request should take
Dto uniquely identify each client application

How the community answered

(23 responses)

A
4% (1)
C
4% (1)
D
91% (21)

Explanation

API keys uniquely identify each client application. The API gateway or server tracks requests per key and applies rate limits (for example, max requests per minute per key), which is how rate limiting is enforced.

Topics

#API keys#Rate limiting

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