Different Cache Layers

Caching can be implemented in the following layers.

• Client caching - Caching on the client side (browser)

• CDN caching - A Content Delivery Network (CDN) which is a globally distributed network of proxy servers, typically serving static content, is considered a type of cache.

• Web server caching - Caching on the web server or proxy server side, which enables returning client response without contacting the application servers or databases.

• Application server caching - Caching on the application server side, which enables returning client response without contacting the database.

• Database caching - Caching on the database side, which enables returning client response without executing the queries.

Reference

• https://www.interviewgrid.com/interview_questions/system_design/caching