What is CDN?
A network of servers around the world that keeps copies of your content close to your users.
In plain English
CDN stands for content delivery network. Instead of every visitor fetching a file from one distant server, the CDN serves a cached copy from a nearby location. Pages load faster, the origin server gets less traffic, and the site is more resilient to spikes.
Example
A site hosted in one country loads images for a visitor on the other side of the world from a nearby CDN location.
Where you will meet it
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Related terms
- DNS: The system that turns names like example.com into the IP addresses computers use.
- High availability: Designing a system so it keeps working when a part of it fails.
Quick answers
What is CDN?
A network of servers around the world that keeps copies of your content close to your users.
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