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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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