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As we know that the Internet is a computer network that connects hosts and end systems
                  throughout the world. In this chapter, we will learn about the Internet and e-mail service
                  of the Internet in detail.

                  The Internet

                  The seed of the Internet was planted in 1969 when
                  the Advanced Research Projects Agency (ARPA)                    Migratory birds navigate with
                                                                                    magnetic fields just as the
                  of the United States Department of Defense began
                                                                                   Internet routes data through
                  connecting  computers  at  different  universities
                                                                                        different networks.
                  and  defence contractors.  The  resulting  network
                  was called Advanced Research Projects Agency
                  Network (ARPANET).

                  In the beginning, ARPANET was a large network serving only a handful of users, but it
                  expanded rapidly. Initially, the network included four primary host computers. The Internet
                  acts  as a  carrier  for  several  different  services, each  with  its own  distinct  features  and
                  purposes.  The  most  commonly  used  Internet  services  are:  World  Wide  Web,  electronic
                  mail, news, file transfer protocol, chat, instant messaging, online services and peer-to-peer
                  services. January 1, 1983 is considered the official birthday of the Internet. Before this, the
                  computer networks did not have a standard way to communicate with each other. A new
                  communications protocol was established named Transmission Control Protocol/Internet
                  Protocol (TCP/IP). The TCP/IP allows computers to be connected to different networks

                  communicate with each other.























                  World Wide Web

                  The World Wide Web (WWW) is a large information system where you can surf and get
                  information. It consists of several public and private websites, which may be interlinked
                  and accessible over the Internet worldwide. WWW is also known as the Web. Many people
                  believe  that  the  World  Wide  Web  and  the  Internet  are  the  same  thing,  but  this  is  not
                  correct. In fact, these are two different things. The Web is a service (a system for accessing
                  information) that is supported by the Internet, a system of interconnected networks.


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