CDN

Definition

A content delivery network distributes or caches files across multiple locations. A nearby location can answer a request without sending every visitor to one origin server. CDN behavior also affects cache invalidation, headers, security controls, and troubleshooting.

Why it matters

CDNs can improve delivery speed and resilience, but an outdated cache can make a correct deployment appear unchanged until it is refreshed or expires.

Common misunderstanding

A CDN does not repair slow source code or poor images automatically; it improves delivery of what it receives.

Related terms

• Hosting
• Server
• Deployment

Related system family: Hosting & Release

Sources

• How the web works (opens in a new tab) · MDN Web Docs
• Cloudflare Pages limits (opens in a new tab) · Cloudflare Developers