1 / 5
The CDN server geographically close to the user that serves cached content is an ___ node.
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Edge nodes (PoPs) sit near users and serve cached copies, cutting latency and offloading the origin.
2 / 5
The source server the CDN fetches from on a cache miss is the ___.
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The origin is your authoritative server; the CDN pulls content from it when it isn't already cached at the edge.
3 / 5
How long an edge node keeps a cached object before revalidating is its ___.
Time To Live (TTL) defines cache freshness; a longer TTL means fewer origin fetches but staler content.
4 / 5
Forcing the CDN to drop a cached object so the next request refetches from origin is a cache ___.
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Purging (invalidation) removes stale objects from edge caches, e.g. after you deploy new assets.
5 / 5
The response header that instructs caches how to store an object (e.g. max-age, no-store) is ___.
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The Cache-Control header tells CDNs and browsers the caching rules, such as max-age for TTL or no-store to disable caching.