A company exposes a REST API using Amazon API Gateway. During peak hours, backend services are overwhelmed by sudden spikes in traffic. The solutions architect needs to protect the backend services without dropping legitimate requests if possible, but must prevent backend crashes. What should be configured?

Answer options:

Enable API Gateway caching.

Enable API Gateway throttling and configure a usage plan.

Place an Application Load Balancer in front of API Gateway.

Use AWS WAF to block requests during peak hours.

How to approach this question

Identify the need to limit request rates to protect backend systems.

Full Answer

B.Enable API Gateway throttling and configure a usage plan.✓ Correct

Enable API Gateway throttling and configure a usage plan.

Amazon API Gateway throttling limits the steady-state request rate and burst capacity. This protects your backend systems from being overwhelmed by traffic spikes.

Common mistakes

Choosing caching, which only helps if the requests are identical and cacheable.

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