4.2 Components of CDN

Content Delivery Network (CDN) consists of the following components:

• Nodes

Nodes are the most basic element that make up a CDN and are responsible for caching, delivery, and security management of content. Nodes are distributed servers with high-speed network connections that are deployed in multiple locations. This allows for the delivery of content from the nearest location when users access it, resulting in fast and stable delivery.

Nodes also have reverse proxies, which communicate with the origin server to retrieve content and cache it locally as needed. If a request is received from a user, the node returns the cached content or sends a request to the origin server to retrieve the content.

CDN nodes are typically monitored, managed, and controlled by highly automated management systems, which reduce operational overhead and ensure high availability and stability.