CDN

A CDN is a network of geographically distributed servers that delivers web content from locations close to users.

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A content delivery network (CDN) copies web content such as images, video and scripts to servers in many locations and serves it from the server closest to each user. It is used to speed up responses and reduce load on the origin server.

A single CDN server and IP address often deliver content for many different websites.

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DNS filtering alone misses direct IP connections, and IP allowlisting alone cannot tell apart the many domains that share one CDN address.


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