Page 7 - SHEET PRIM 5 1ST TERM
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Open network                                 Closed network

                                                              It is part of the open network, but it
                It is open and accessible to all
                                                              is specific to a specific part
                Ex: internet
                                                              Ex: school lab



              World Wide Web (WWW): is part of the internet network, made up of web pages
              that people can navigate.
              Ex: The Egyptian knowledge bank (EKB)

                 A timeline of the technological development of the internet

                 ➢  80s (Dial up internet connection)

              Used phone line to connect to internet, it’s slow but stable connection.
              Couldn’t use phone when on internet.


                 ➢  Late 80s (Digital Subscriber line (DSL)
              A high-speed connection that uses phone wires to connect to the internet.
              Allowing the phone and the internet to be used simultaneously (at the same
              time).


                 ➢  90s (Emergence of the world wide web)
                                                                                                          .
              WWW is a large set of web pages that are linked to each other using hyperlinks


                 ➢  2000+ (Wi-Fi devices)

              You can access the internet from your smartphone through Wi-Fi, Portable
              internet service and Hotspots.














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