Recently, your networking team enabled Cloud CDN for one of the external-facing services that is exposed through an external Application Load Balancer. The application team has already defined which…

Question

Options

• AConfigure the CACHE_ALL_STATIC caching mode on Cloud CDN to ensure Cloud CDN caches
• BConfigure the FORCE_CACHE_ALL caching mode on Cloud CDN to ensure all appropriate
• CConfigure the USE_ORIGIN_HEADERS caching mode on Cloud CDN to ensure Cloud CDN
• DConfigure the CACHE_ALL_STATIC caching mode on Cloud CDN to ensure Cloud CDN cache

• A
  8% (5)
• B
  17% (11)
• C
  72% (46)
• D
  3% (2)

Explanation

Since the application team already defined caching behavior via Cache-Control headers in responses, the correct Cloud CDN caching mode is USE_ORIGIN_HEADERS. This mode instructs Cloud CDN to respect the cache directives sent by the origin server. Without this mode set explicitly (or if the wrong mode is configured), Cloud CDN may ignore the origin's cache headers. CACHE_ALL_STATIC caches only static content types regardless of headers. FORCE_CACHE_ALL overrides headers and caches everything, which could cache content that should not be cached. USE_ORIGIN_HEADERS is the appropriate mode when the origin already controls caching logic.

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