तैयारी4नेट

https://en.wikipedia.org

Original top-level domains[edit]

Seven generic top-level domains were created early in the development of the Internet, and predate the creation of ICANN in 1998.

• Name: DNS names
• Entity: intended use
• Notes: general remarks
• IDN: support for internationalized domain names (IDN)
• DNSSEC: presence of DS records for Domain Name System Security Extensions

Name	Entity	Administrator[5]	Notes	IDN	DNSSEC
.com	commercial	Verisign	This is an open TLD; any person or entity is permitted to register. Though originally intended for use by for-profit business entities, for a number of reasons it became the "main" TLD for domain names and is currently used by all types of entities including nonprofits, schools, and private individuals. Domain name registrations may be successfully challenged if the holder cannot prove an outside relation justifying reservation of the name[citation needed], to prevent "squatting". It was originally administered by the United States Department of Defense.	Yes	Yes
.edu	education	Educause (via Verisign)	The .edu TLD is limited to specific higher educational institutions such as, but not limited to, trade schools and universities. In the U.S., its use was restricted in 2001 to post-secondary institutions accredited by an agency on the list of nationally recognized accrediting agencies. This domain is therefore almost exclusively used by American colleges and universities. Some institutions, such as the Exploratorium, that do not meet the current registration criteria have grandfathered domain names.	No	Yes
.gov	U.S. national and state government agencies	General Services Administration (via Verisign)	The .gov TLD is limited to United States governmental entities and agencies as well as qualifying state, county and local municipal government agencies.	No	Yes
.int	international organizations	Internet Assigned Numbers Authority	The .int TLD is strictly limited to organizations, offices, and programs endorsed by a treaty between two or more nations. However, a few grandfathered domains do not meet these criteria.	No	Yes
.mil	U.S. military	United States Department of Defense	The .mil TLD is limited to use by the United States military.	No	Yes
.net	network	Verisign	is an open TLD; any person or entity is permitted to register. Originally intended for use by domains pointing to a distributed network of computers, or "umbrella" sites that act as the portal to a set of smaller websites.	Yes	Yes
.org	organization	Public Interest Registry	This is an open TLD; any person or entity is permitted to register. Originally intended for use by non-profit organizations, and still primarily used by some.	Yes	Yes

In