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【SAA-C03助理级解决方案架构师认证】
A company is running a publicly accessible serverless application that uses Amazon API Gateway and AWS Lambda.
The application's traffic recently spiked due to fraudulent requests from botnets. Which steps should a solutions architect take to block requests from unauthorized users?(Select TW0.)
A : Create a usage plan with an API key that is shared with genuine users only.
B : Integrate logic within the Lambda function to ignore the requests from fraudulent addresses.
C : Implement an AWS WAF rule to target malicious requests and trigger actions to filter them out.
D : Convert the existing public API to a private API. Update the DNS records to redirect users to the new API endpoint.
E : Create an IAM role for each user attempting to access the API. A user will assume the role when making the API call.