A Company Is Using an Amazon CloudFront Distribution to Distribute

question 197

Multiple Choice

A company is using an Amazon CloudFront distribution to distribute both static and dynamic content from a web application running behind an Application Load Balancer. The web application requires user authorization and session tracking for dynamic content. The CloudFront distribution has a single cache behavior configured to forward the Authorization , Host , and User-Agent HTTP whitelist headers and a session cookie to the origin. All other cache behavior settings are set to their default value. A valid ACM certificate is applied to the CloudFront distribution with a matching CNAME in the distribution settings. The ACM certificate is also applied to the HTTPS listener for the Application Load Balancer. The CloudFront origin protocol policy is set to HTTPS only. Analysis of the cache statistics report shows that the miss rate for this distribution is very high. What can the Solutions Architect do to improve the cache hit rate for this distribution without causing the SSL/TLS handshake between CloudFront and the Application Load Balancer to fail?

• A) Create two cache behaviors for static and dynamic content. Remove the User-Agent and Host HTTP headers from the whitelist headers section on both of the cache behaviors. Remove the session cookie from the whitelist cookies section and the Authorization HTTP header from the whitelist headers section for cache behavior configured for static content. Create two cache behaviors for static and dynamic content. Remove the User-Agent and HTTP headers from the whitelist headers section on both of the cache behaviors. Remove the session cookie from the whitelist cookies section and the HTTP header from the whitelist headers section for cache behavior configured for static content.
• B) Remove the User-Agent and Authorization HTTP headers from the whitelist headers section of the cache behavior. Then update the cache behavior to use presigned cookies for authorization. Remove the and HTTP headers from the whitelist headers section of the cache behavior. Then update the cache behavior to use presigned cookies for authorization.
• C) Remove the Host HTTP header from the whitelist headers section and remove the session cookie from the whitelist cookies section for the default cache behavior. Enable automatic object compression and use Lambda@Edge viewer request events for user authorization. HTTP header from the whitelist headers section and remove the session cookie from the whitelist cookies section for the default cache behavior. Enable automatic object compression and use Lambda@Edge viewer request events for user authorization.
• D) Create two cache behaviors for static and dynamic content. Remove the User-Agent HTTP header from the whitelist headers section on both of the cache behaviors. Remove the session cookie from the whitelist cookies section and the Authorization HTTP header from the whitelist headers section for cache behavior configured for static content. Create two cache behaviors for static and dynamic content. Remove the HTTP header from the whitelist headers section on both of the cache behaviors. Remove the session cookie from the whitelist cookies section and the

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Definitions:

Completion Ratios

The percentage of tasks or projects completed out of the total planned, often used as a performance indicator in project management.

Conversion Costs

Costs associated with converting raw materials into finished goods, including labor and manufacturing overhead.

Direct Materials

The raw materials directly used in the manufacturing of a product, clearly identifiable and assignable to that product.

Indirect Labor

Labor costs associated with supporting the production process but not directly working on the product, such as maintenance or supervision.