What is a CDN? What are the characteristics of CDN?

The full name of CDN is Content Delivery Network, that is, content distribution network.

main feature

1, local cache acceleration: it improves the access speed of enterprise websites (especially those containing a large number of pictures and static pages) and greatly improves the stability of the above websites. 2. Mirror service: Eliminate the influence of interconnection bottleneck between different operators, realize network acceleration across operators, and ensure that users of different networks can obtain good access quality.