ANS-C01 Question 15
Select 4You are designing a content distribution solution for a global e-commerce application that experiences high traffic during sales events. The application serves dynamic content, such as user-specific recommendations, and static assets like images and videos. Which of the following design patterns should you implement using Amazon CloudFront to optimize performance and cost efficiency?
- A
Use Cache Behaviors in CloudFront to forward specific HTTP headers to the origin for dynamic content personalization.
- B
Enable Lambda@Edge to modify requests and responses at the edge for dynamic content caching and user-specific customizations.
- C
Use CloudFront's Origin Shield feature to reduce the load on the origin and improve cache hit ratio.
- D
Configure CloudFront to cache dynamic content indefinitely to eliminate origin requests.
- E
Leverage CloudFront's Regional Edge Caches to minimize latency and improve delivery performance for static content.
Show answer and explanation
Correct answers: A, B, C, E
Explanation
To optimize performance and cost efficiency for a global e-commerce application, a combination of strategies leveraging Amazon CloudFront's features is necessary. Cache Behaviors and Lambda@Edge enable personalization and dynamic content optimization. Origin Shield reduces origin load and enhances cache hit ratios. Regional Edge Caches improve delivery speed for static content, reducing latency for users. However, caching dynamic content indefinitely is not recommended as it risks serving outdated information.
- A. Correct.
Correct: Forwarding specific HTTP headers to the origin allows CloudFront to differentiate and cache personalized content effectively, optimizing dynamic content delivery.
- B. Correct.
Correct: Lambda@Edge enables the customization of requests and responses at the edge, which is critical for dynamic content personalization and caching strategies.
- C. Correct.
Correct: Origin Shield reduces the frequency of requests to the origin by serving frequently accessed content from a central hub, improving cache efficiency.
- D. Incorrect.
Incorrect: Caching dynamic content indefinitely is not practical as it can lead to outdated or incorrect data being served to users. Dynamic content often requires a short TTL or no caching at all.
- E. Correct.
Correct: Regional Edge Caches help improve performance by serving content closer to users and reducing latency, especially for static assets.