A content delivery network uses delivery infrastructure, often at multiple locations, to supply content and direct requests to suitable delivery endpoints. It can retain objects through caching or retrieve them from an origin. Distribution across sites does not imply that those sites have independent administrative control.[ref]
A CDN edge is a delivery endpoint of a content delivery network. It may use caching or fetch content, and a provider can authorise it to terminate a client connection. Its location near demand and its administrative authority are separate properties.

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A Content Delivery Network (CDN) is a system of distributed servers that work together to deliver digital content (such as web pages, images, videos, and other types of data) to users based on their geographic location. The primary goal of a CDN is to improve the performance, speed, and reliability of content delivery to end users.