Except you don’t do all of these three requests, you just access your hoster’s DNS server which already had this cached most probably and returns it. For most

Except you don’t do all of these three requests, you just access your hoster’s DNS server which already had this cached most probably and returns it. For most of the cases, you will never be hitting root at all. If the system was as hierarchical as it was proposed in the parent it would never be stable enough to work due to a single point of failure at root. Ergo, hierarchies are not natural.