Page 108 - Web Applications (803) Class 11
P. 108

When ARPANET and NSFNET were linked together, the network’s growth exploded. The TCP/IP protocol (communication
              rules) served as a glue to bring together many heterogeneous networks into a single network. Thus, the Internet was
              born. The Internet is a large network (network of networks).

                                                                                                      Subject Enrichment

                        Video Session


                   Scan the QR code or visit the following link to watch the video: Evolution of the Internet
                   https://www.youtube.com/watch?v=km9-XQZkOSE
                   Now answer the following questions:
                   1.  How many nodes were initially connected to ARPANET?
                      .....................................................................................................................................................................................
                   2.  Who invented the WWW?
                      .....................................................................................................................................................................................

                   3.  Who launched the first internet-enabled mobile phone?
                      .....................................................................................................................................................................................





                      Do You Know?

                     •  75 million servers control the Internet.
                     •  Over 550000 miles of underwater cable form the internet’s backbone.
                     •  The internet connects roughly one billion computer systems.
                     •  To answer a single Google search query, 1000 server computers are used in 0.2 seconds.


                 1.2 BASIC CONCEPTS OF NETWORKING

              As we know, a group of people connected with each other through a social relation or similar interest. They can
              communicate with each other and share thoughts and ideas. This kind of group of people is known as a social network.
              Similarly, a group of computers that can communicate with one another across a shared medium is referred to as
              a network. It is also known as a computer network. The overall process of connecting computers and exchanging
              information between them is called networking. Networking includes computers that are to be connected, networking
              protocols, software, and transmission media through which computers are connected and share information. Following
              figure shows a computer network:

                                                   Workstation
                                                      Client


                                                                                     Server
                                                                 Networking
                                                                   Device






                                                                          Workstation Client
                                            Workstation Client

                106     Touchpad Web Applications-XI
   103   104   105   106   107   108   109   110   111   112   113