Get the latest tech news
A Comprehensive Introduction to CDNs
For many people, CDNs are an obvious requirement for any public API or web service. However, I’ve come to realize that for the vast majority, they remain somewhat mysterious - or something they’re unaware of, even though they unknowingly use them daily.
Fastly also allows you to associate arbitrary WebAssembly modules with a service, which enables you to control how individual requests are handled. A host, origin, or content server refers to the machine that the CDN proxies relay HTTP queries to and receive responses from. However, they are actually quite simple to use and can quickly improve the security and efficiency of a web service without requiring significant changes.
Or read this on Hacker News