CDN and Reverse Proxy

Websites need to speed up access to websites, with the main means of using CDN and reverse proxies.

The basic principle of SDN and reverse proxy is cache, the difference is that the CDN is deployed in the network provider's room, so that users can request the site service, from their nearest network to provide opportunity room to obtain data;

And the reverse proxy is deployed in the central room of the site, when the user requests to reach the central room, the first access to the server reverse proxy server, if the reverse proxy Server cache the user requested resources, it is directly returned to the user.

Both of these techniques are used to speed up user access and reduce load pressure on the backend servers on the one hand.