The domain name system (DNS) is a series of letters and numbers that are separated by periods and used to name organizations, computers and addresses on the Internet. The domain name is the way that Internet names are located and translated into Internet Protocol Addresses. It is a meaningful and easy to handle Internet address. Domain names are used in URLs to identify a particular page.
Every domain name has a suffix that indicates which top-level domain (TLD) it belongs to. There are only a limited number of domains such as: .gov-Government agencies, .edu- Educational institutions, .org–Organizations (nonprofit), .mil–Military, .com-commercial business, .net-Network organizations, and the first two or three letters of the countryname like .ca-Canada, .th-Thailand or .in for India.
Individual Internet host computer uses domain names as host identifiers, or hostnames. Hostnames are the leaf labels in the domain name system usually without further subordinate domain name space. Hostname appears as a component in Uniform Resource Locators (URLs) for Internet resources. More than one domain name can be mapped to the same Internet address. This allows multiple individuals, businesses, and organizations to have separate Internet identities while sharing the same Internet server.
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