How do multiple web/database servers work together?
Say I have a domain "abc.com". If I had three web servers, how exactly would I go about setting them up to work with each other for the one domain - "abc.com"?I'm trying to understand this but can't see how it's done

Anyone know anything or can show me a website that explains this better?
The same question applies to databases - I know some people have like 3 database servers. How would that work, assuming the DB was MySQL?
Sorry for the stupid question
