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Some common Top-Level Domains are as follows:
Abbreviations Used to Denote
.com Commercial firms
.edu Universities/Educational firms
.gov Government Bodies/Organisations
.mil Military Organisations
.net ISP’s/Networks
.org Non-Government/Non-Profit Organisations
.co National and Multinational Companies
.int International Organisations
In DNS, codes of countries can also be included. The code comprises of two letters. Some common codes of
certain countries are:
Code Denotes the Country
.au Australia
.uk United Kingdom
.jp Japan
.fr France
.in India
.us United States of America
.nz New Zealand
• IP (Internet Protocol) Address: It is a unique logical address of a device that helps identify a device at the time of
sending and receiving data in a Network. It is made up of numbers or characters. Remembering these numeric
values to access a specific website is a difficult task, so these numbers are given sensible textual names called web
addresses.
Symbolics.com was the first registered domain. It was registered March 15, 1985.
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