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Domain Name System Dns Hierarchy. With the increase of users over time RFC 805 was created to extend email addresses to where domain should be a hierarchy of hosts. The DNS hierarchical inverted tree structure is called the DNS namespace.
Servers may delegate management of subdomainsto child name servers. The Domain Name System resolves the names of internet sites with their underlying IP addresses adding efficiency and even security in the process. The domain name space refers a hierarchy in the internet naming structure.
In the above diagram each subtree represents a domain.
It associates various information with domain names assigned to each of the participating entities. The domain hierarchy that is shown in the following figure is a leaf of the huge DNS namespace supported on the global Internet. Servers may delegate management of subdomainsto child name servers. The DNS Hierarchy Organization of DNS is based on a naming system called domain namespace a hierarchical highly-extensible tree structure in which each domain is a node.