Edge Servers
Content Delivery Networks (CDNs) distribute edge servers in hundreds of datacenters globally. When a user requests a file, the CDN routes the request to the closest server (Anycast), reducing the distance packets must travel.
Origin Shielding and Caching
Edge servers cache static assets (CSS, JS, images). If a resource is cached, it is returned immediately (Cache Hit). If missing (Cache Miss), the CDN fetches it from your origin server, caching it for subsequent visits.