A massive shout out to J. Ball & his works "the System" & huffingtonpost.co.uk/entry/what-hap… beautifully explaining how this world actually works.
2/ Everything begins with you, the internet user deciding to visit a certain website. You either click a link or hit "enter/return" after writing a URL into your browser.
What happens then, in parallel to the page loading, may be summarised by: