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Question 77 - CAS-004 discussion

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Clients are reporting slowness when attempting to access a series of load-balanced APIs that do not require authentication. The servers that host the APIs are showing heavy CPU utilization. No alerts are found on the WAFs sitting in front of the APIs.

Which of the following should a security engineer recommend to BEST remedy the performance issues in a timely manner?

A.
Implement rate limiting on the API.
Answers
A.
Implement rate limiting on the API.
B.
Implement geoblocking on the WAF.
Answers
B.
Implement geoblocking on the WAF.
C.
Implement OAuth 2.0 on the API.
Answers
C.
Implement OAuth 2.0 on the API.
D.
Implement input validation on the API.
Answers
D.
Implement input validation on the API.
Suggested answer: A

Explanation:

Rate limiting is a technique that can limit the number or frequency of requests that a client can make to an API (application programming interface) within a given time frame. This can help remedy the performance issues caused by high CPU utilization on the servers that host the APIs, as it can prevent excessive or abusive requests that could overload the servers. Implementing geoblocking on the WAF (web application firewall) may not help remedy the performance issues, as it could block legitimate requests based on geographic location, not on request rate. Implementing OAuth 2.0 on the API may not help remedy the performance issues, as OAuth 2.0 is a protocol for authorizing access to APIs, not for limiting requests. Implementing input validation on the API may not help remedy the performance issues, as input validation is a technique for preventing invalid or malicious input from reaching the API, not for limiting requests. Verified

Reference: https://www.comptia.org/blog/what-is-rate-limiting https://partners.comptia.org/docs/default-source/resources/casp-content-guide

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asked 02/10/2024
Dominique Dusabe
42 questions
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