Domain Name System Hierarchy

For example the ajax domain that is shown in figure 3 5 has been registered as part of the internet com hierarchy.

Domain name system hierarchy. Before the domain name structure was developed computer names and ip addresses were mapped using a flat list and stored in a simple text file called the hosts file. Fqdn is otherwise called an absolute domain name. A fully qualified domain name is supposed to have little ambiguity.

The dns root zone is the highest level in the dns hierarchy tree. The dns hierarchy is comprised of the following elements. The internet maintains two principal namespaces the domain name hierarchy and the internet protocol ip address spaces.

After your local domain is registered its name is added to the name of the internet hierarchy to which the domain belongs. The domain name system maintains the domain name hierarchy and provides translation services between it and the address spaces. Internet name servers and a communication protocol implement the domain name system.

Domain names indicate a domain s position in the overall dns namespace much as path names indicate a file s position in the unix file system. 3 second level domains. To understand the domain name structure you really need to understand the problem the structure was meant to solve.