Youtube https://youtu.be/TNQsmPf24go
https://youtu.be/eHp1l73ztB8
Mozzila https://developer.mozilla.org/en-US/docs/Learn/Common_questions/Web_mechanics/How_does_the_Internet_work
https://developer.mozilla.org/en-US/docs/Learn/Common_questions/Web_mechanics/Pages_sites_servers_and_search_engines