# Articles tagged with "web performance"

Explore all content related to web performance on xTom.

5/22/2026  
**What Is a CDN and How Do They Work?**  
A content delivery network (CDN) is a globally distributed system of servers that delivers web content to users faster by serving it from a location close to them. This article explains what CDNs are, how they work under the hood, and when you actually need one.

[#CDN](/content/tags/cdn/index.html) [#content delivery network](/content/tags/content-delivery-network/index.html) [#web performance](/content/tags/web-performance/index.html) [#caching](/content/tags/caching/index.html) [#edge servers](/content/tags/edge-servers/index.html) [#IaaS](/content/tags/iaas/index.html) [#networking](/content/tags/networking/index.html) [#latency](/content/tags/latency/index.html)