4 ms·
DNS only has two levels practically. And technically if you go more than one level you’re probably getting a reply from the same second-level system.
by heavenlyblue 7y ago
DNS only has two levels practically. And technically if you go more than one level you’re probably getting a reply from the same second-level system.
- toast0 7y agoI count at least three levels for most domains. Root, TLD, domain holder, sometimes further delegation depending on the domain holder.
- heavenlyblue 7y agoExcept 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.