Answer Posted / rajeshwaran

A domain name is an identification label that defines a
realm of administrative autonomy, authority, or control in
the INTERNET based on the DOMAIN NAME SYSTEM(DNS)

Domain names are used in various networking contexts and
application-specific naming and addressing purposes. They
are organized in subordinate levels (subdomains) of the DNS
root domain, which is nameless. The first-level set of
domain names are the top-level domains (TLDs), including
the generic top-level domains (gTLDs), such as the
prominent domains com, net and org, and the country code
top-level domains (ccTLDs). Below these top-level domains
in the DNS hierarchy are the second-level and third-level
domain names that are typically open for reservation by end-
users that wish to connect local area networks to the
Internet, run web sites, or create other publicly
accessible Internet resources. The registration of these
domain names is usually administered by domain name
registrars who sell their services to the public.

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