Conversation so far:
where did the term net neutrality come from
The term net neutrality was coined by Columbia University media law professor Tim Wu in 2003, as an extension of the longstanding concept of a common carrier
what is the definition of net neutrality
the idea, principle, or requirement that Internet service providers should or must treat all Internet data as the same regardless of its kind, source, or destination

Question: what does the principle prevent isps from doing
Self-contained rewrite: what does net neutrality prevent isps from doing