Content Delivery Network (CDN)

A Content Delivery Network (CDN) is a geographically distributed system of edge servers and points of presence (PoPs) that cache and deliver web content, media, APIs, and static assets to end users based on proximity. It reduces latency, conserves origin resources, improves availability and scalability, and enables features like TLS termination, HTTP/2/3, and granular caching policies.

Think of a CDN like a chain of neighborhood warehouses that keeps copies of your website and media close to users; requests are routed to the nearest edge node via DNS/Anycast and cache logic, reducing round‑trips to the origin. You place it in front of your origin servers and integrate it with load balancers, WAFs, and CI/CD pipelines so edge nodes handle caching, compression, TLS offload and edge compute. For streaming or API traffic the CDN segments, caches and serves chunks or applies origin‑fetch rules so dynamic and static content are delivered with minimal latency.

The Content Delivery Network (CDN) market is dominated by global edge providers and cloud platform CDNs, with specialist vendors, regional telcos and ISPs operating local PoPs or acting as resellers. Buyers include media/streaming companies, e‑commerce sites, gaming publishers, SaaS firms and large enterprises seeking performance, scalability and DDoS protection; small businesses typically adopt integrated cloud CDNs. Commercial models mix pay‑as‑you‑go bandwidth, request tiers and enterprise agreements, while peering arrangements, IXPs and regional regulation influence competitive reach and margins.