Concepts

Concepts are a collection of guides that introduce you to core ideas essential to understanding content delivery networks (CDNs) and Fastly.

Content types delivered by Fastly The underlying protocol used by the World Wide Web to define how content is formatted and transmitted is…

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Our points of presence (POPs) on the internet are strategically placed at the center of the highest density Internet Exchange Points around…

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An application programming interface (API) facilitates communication between technology products and systems. It is sometimes said that APIs…

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A cache is a location that temporarily stores data for faster retrieval by the things that need to access it. Caching refers to the process of storing this data.

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A content delivery network, or CDN, is a network of servers distributed all across the world that work together to make delivering content…

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Cache invalidation, otherwise known as purging or cache purge, is the process of eliminating content from cache ahead of when it would naturally expire or be evicted. Once content is purged, a request for that content will be retrieved from the source rather than the cache.

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