Exam 350-901 topic 1 question 374 discussion

B. no-cache The no-cache directive in the Cache-Control HTTP header allows the data to be cached but requires that the cached version is revalidated with the server before being served to the client in response to subsequent requests. This ensures that the client always receives the most up-to-date data while still benefiting from caching to improve performance. It's worth mentioning that the term no-cache might be a bit misleading as it does not prevent caching; it only requires revalidation of the cache.

B. no-cache. Setting the Cache-Control header to "no-cache" will instruct caches, including the client's cache, to revalidate the cached response with the origin server before serving it to subsequent requests. This ensures that the cached data is validated during each request, meeting the requirement stated in the question.

The engineer should set the value to D. max-age in the Cache-Control header to meet these requirements. This value will allow the cache to be shared by all users and will validate the cache during each request.