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.

Related Terms

An HTML element that tells search engines which URL is the preferred version of a page when duplicate or similar content exists at multiple URLs.

A high-performance RPC framework using Protocol Buffers and HTTP/2 for efficient service-to-service communication.

SPA (Single Page Application)

A web application that loads a single HTML page and dynamically updates content without full page reloads.

Progressive Web App (PWA)

A web application that uses modern web capabilities to deliver app-like experiences with offline support and push notifications.

An automatic OPTIONS request sent by browsers before certain cross-origin requests to check if the actual request is permitted.

A widely-used server-side scripting language designed for web development that powers over 75% of websites including WordPress.

View All Web Development Terms →