Domain Name System Tree. DNS Domain Name System Name service in Internet Zone is an administrative unit domain is a subtree. A phylogenetic tree based on rRNA data showing the separation of bacteria archaea and eukaryota domains.
It contacts authoritative name server. DNS hierarchy tree is maintained By IANA which has database of Top-level domain zone operators. Each node in a tree has a domain name and a full domain name is a sequence of symbols specified by dots.
The domain name itself consists of the label concatenated with the name of its parent node on the right separated by a dot.
Fully Qualified Domain Name FQDN It is essential to know about Fully Qualified Domain Name FQDN to understand the DNS hierarchy. More recently various fusion hypotheses have begun to dominate the literature. Hierarchy of Name Servers Root name servers It is contacted by name servers that can not resolve the name. The Domain Name System DNS has a hierarchical inverted tree structure.