Web Development Intermediate

What is CDN (Content Delivery Network)?

A distributed network of servers that delivers web content to users from the geographically closest location.

CDNs cache content (images, CSS, JavaScript, videos) at edge servers worldwide. When a user requests content, it is served from the nearest edge server instead of the origin server, reducing latency and load.

Benefits include faster page loads, reduced bandwidth costs, DDoS protection, and high availability. Popular CDNs include Cloudflare, AWS CloudFront, Akamai, and Fastly.

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Related Terms

A mechanism where a server sends real-time HTTP POST notifications to a specified URL when specific events occur.

Server-Sent Events (SSE)

A web technology enabling servers to push real-time updates to browsers over a single HTTP connection, simpler than WebSockets.

SSR (Server-Side Rendering)

A technique where web pages are rendered on the server and sent as complete HTML to the browser, improving SEO and initial load time.

HTTP headers that control cross-origin resource sharing between different domains, specifying allowed origins, methods, and headers.

The latest HTTP version that uses QUIC instead of TCP, providing faster connections and better performance on unreliable networks.

Brotli Compression

A modern compression algorithm developed by Google that achieves better compression ratios than Gzip for web content delivery.

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