To answer your first question, the constitutional response would be "it doesn't". Legally, I'm unaware of any edge cases, except potentially some net neutrality

To answer your first question, the constitutional response would be "it doesn't". Legally, I'm unaware of any edge cases, except potentially some net neutrality related things. (I'm not very certain about NN.) My point, however, is that this is neither a legal nor constitutional obligation, but a social and voluntary obligation to a free society.