A Content Delivery Network (CDN) is a service that enhances content delivery across the Internet. It is neither a SaaS nor an IaaS (Infrastructure as a Service). Instead, it is referred to as a Network as a Service (NaaS). To cache and deliver website content to end users, CDNs rely on a global network of distributed servers. While SaaS and IaaS services are used to create, manage, and deploy software and infrastructure, respectively, content delivery networks (CDNs) are focused on optimizing content delivery. To reduce latency and improve website load times, cached content is served from the nearest available server. As a result, CDNs are an indispensable tool for website owners who need to ensure fast and dependable content delivery to users all over the world.