Top Level Dns Domain Name Hierarchy

Examples of tlds top level domains are edu net org com gov etc.

Top level dns domain name hierarchy. The internet root domain top level domains organizational and geographical are maintained by the various internet governing bodies. The dns tree has a single domain at the top of the structure called the root domain. In order to reach cse dtu in we have to ask the root dns server then it will point out to the top level domain server and then to authoritative domain name server which actually contains the ip address. The dns root zone is the uppermost level in the dns hierarchy tree.

Domain names are hierarchical and each part of a domain name is referred to as either the root top level second level or as a sub domain. Dns name space hierarchy the name space is organised in a hierarchic tree. 3 second level domains. For the domain name system to function properly each component of the dns hierarchy has a server that provides answers to queries initiated by the internet users.

The dns hierarchy also called the domain name space is an inverted tree structure much like nds. The root name server is the name server for the root zone. Hierarchy of name servers. The second level in the dns hierarchy is made up of the business names or organization names.

Dns uses domain names to form the hierarchy. A period or dot is the designation for the root domain. Note that the com domain introduced in this figure is one of a. Every dns domain must have a domain name.

To allow computers to properly recognize a fully qualified domain name dots are placed between each part of the name. Responsibility for a subtree can be delegated to another organisation e g. The figure consists of the root directory which is represented as a dot and two top level domain hierarchies one organizational and one geographical. The dns hierarchy is comprised of the following elements.

The dns uses a hierarchical system database for resolving name address. So the authoritative domain server will return the associative ip address. At the second level in the dns hierarchy an organization has control over its own name resolution and is authoritative to its own dns database. Fqdn is otherwise called an absolute domain name.

After the root the next layer in the dns hierarchy is called as tlds top level domains. Below the root domain are the top level domains that divide the dns hierarchy into segments. The domain hierarchy that is shown in the following figure is a leaf of the huge dns namespace supported on the global internet. Sub domains third level domains host.

The dns root zone is the highest level in the dns hierarchy tree. The domain name system dns is made up of a hierarchy of 5 important components. From an isp to a company. 2 top level domains.

All resolvers treat dots as separators between the parts of the domain name.