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Glossary

What is CDN (content delivery network)?

Also called: content delivery network, edge network, Cloudflare.

CDN stands for content delivery network. Instead of every visitor loading your site from one server in one data centre, a CDN stores copies of your images, code and often whole pages at many locations, and serves each visitor from the nearest one.

That makes pages load faster, particularly images, and it takes the strain off your main server when traffic spikes. Many CDNs also block some kinds of attacks.

Cloudflare, Fastly and Amazon CloudFront are well-known examples. Many modern hosting services include a CDN automatically.

Why it matters for your business

For a local business most visitors are nearby anyway, so the main benefits are speed, reliability and some protection against attacks. It is a sign of decent hosting, and it usually costs you nothing extra when it is built in.

Example. A café's site is hosted with a CDN, so when a local paper shares their new menu and hundreds of people visit at once, the site stays fast.

Related terms

Caching · Hosting · Page speed · Uptime

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