# cdn

**Published by:** [FSDFC](https://paragraph.com/@fsdfc/)
**Published on:** 2022-09-29
**URL:** https://paragraph.com/@fsdfc/cdn

## Content

`The functional entities included in the CDN network include content caching devices, content switches, content routers, CDN content management systems, etc.` Content caching is a CDN network node located at the user access point. It is a content providing device for end users. It can cache static Web content and streaming media content to achieve content edge propagation and storage, so that users can access it nearby. The content switch is at the user access concentration point, which can balance the load of multiple content cache devices at a single point, and perform cache load balancing and access control on the content. The content router is responsible for scheduling the user's request to the appropriate device. Content routing is usually implemented through a load balancing system, which dynamically balances the load distribution of each content cache site, selects the best access site for user requests, and improves the availability of the website. The content router can make routing based on a variety of factors, including the proximity between the site and the user, the availability of content, network load, and equipment conditions. The load balancing system is the core of the entire CDN. The accuracy and efficiency of load balancing directly determine the efficiency and performance of the entire CDN. The content management system is responsible for the management of the entire CDN. It is an optional component, which is used for content management, such as content injection and release, content distribution, content audit, content services, etc.

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