There's a fundamental mistake in this article.

I quote: "But the “phone book” mental model might make you think that if you make a DNS query for google.com, you’ll always get the same result. And that’s not true at all!"

Phone books are not a static model either. If you were to look up "Walmart" in your local phone book, you're going to get a different set of phone numbers for the Walmart stores around you as compared to five states to the West or East of where you are. As such, the mental model really is apt.