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Text-based addressing system on the Internet is called Domain Name System (DNS). In this system, each
              website has a unique name such as oracle.com, cbse.nic.in, etc.
              The last three letters of the web address are known as Top Level Domain (TLD) which provides information
              about the root of the domain for the type of organisation to which the address belongs. It is alphabetical and
              helps to identify an address in Domain Name System.
              Some common Top Level Domains are:

                                   Abbreviations                   Used To Denote

                                  .com              Commercial Firms
                                  .edu              Universities/Educational firms

                                  .gov              Government Bodies/Organisations
                                  .mil              Military Organisations

                                  .net              ISP’S/Networks
                                  .org               on- overnment/ on-Profit Organisations

                                  .co               National & Multinational Companies
                                  .int              International Organisations


              In DNS, codes of the country 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
              Web Servers

              Web server is the principal computer or
              server that stores the contents of different
              websites. It provides data and information
              to computers on request which  are
              connected to it through the network via
              the Internet.
              In other  words, it can be said that  it is
              a computer that  stores data  and runs
              software that  are designed to send web
              pages  in  file  format  when  requested  by
              web browsers.




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