In this video I explain Apple’s Content Caching. Then I go over the setup and monitoring of Content Caching.
https://support.apple.com/guide/mac-help/about-content-caching-on-mac-mchl9388ba1b/mac
https://support.apple.com/en-us/HT204675
https://support.apple.com/guide/mac-help/view-content-caching-logs-statistics-mac-mchl0d8533cd/10.14/mac/10.14