The internet is divided into many conceptual group, such as educational, commercial, military, government etc. this logical collection is known as domain.
What are domains ?
Domains divide world wide web sites into categories based on the nature of their owner, and they form part of a site’s address, or uniform resource Locator (URL).
Some of the major domains names are given below, these domains are known as top level domain
.com – commercial organization, business and individuals
.edu – educational institutes
.gov – military institute
.org – other organization and groups
.arts – cultural groups
.firm – businesses firm
.info – information services
.rec – recreational sites
.store – retailers
.web – web-related organizations
.int – organizations established by international treaty
Additional three-letter and four-letter and four-letter top-level domains have been proposed, and some are likely to be implemented.
Each country linked to the web has a two-letter top-level domain. For example, .in is used for India.
The domain names are also used in E-mail address, for example if an E-mail address is firstname.lastname@example.org, then the .com will inform us that e-mail address is located on a commercial computer.
In an e-mail address such as email@example.com, the “.in” inform us that this mail address is on an Indian server. “.net” inform us that server is of a network service provider. “vsnl” is the name of the internet server. “example” is the user name into whose mailbos the mall is deposited.
When an Internet address is given to an internet browsing software to browse the address, the address is read from right side proceeded to the left. From a larger domain . domain, it looks for increasingly smaller ones until a particular and unique computer is reached.
As in our above example, only one computer with vsnl.net.in could be there in the entire internet. The “vsnl” name can be given to another domain such as there could be a vsnl.com or vsnl.edu etc, but there should be only one vsnl.net.in.