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    Server: This is a powerful system or device that provides services, resources or data to other
                        computers over a network.
                       Internet: This is a vast and globally connected network of networks that enables data exchange
                        and communication between billions of devices worldwide.

                       Intranet: An intranet is a secured internal network available only to members of a specific
                        organisation, usually its employees.
                       URL: Uniform Resource Locator (URL) is a unique address used to identify and access specific

                        resources on the Internet.

                                                                                                             PURE
                         Tim Bernars-Lee, a British computer expert, designed the first website in the
                         year 1991.                                                                          FACT

                       ISP: An Internet Service Provider (ISP) is an organisation that offers services for accessing,

                        using or participating in the Internet.

                       IP address: This is unique number assigned to every device connected to the Internet. It helps
                        identify computers, smartphones, servers and more.

                       DNS: Domain  Name  System  (DNS) converts  website  names  into  machine-readable  IP
                        addresses. It allows users to access websites using simple names instead of numbers.

                       Network bandwidth: This refers to the amount of data that can be transmitted across a network
                        in a given time, usually measured per second.

                                                                                                             PURE

                         The Internet is controlled by 7.5 crore servers.                                    FACT

                               NETWORK DEVICES

                     There are various devices used in a network. These include:
                       Network Interface Card (NIC): A device attached to a computer
                        that  enables  communication  over a  network.  The NIC contains
                        a ROM chip that has a unique number called the Media Access
                        Control (MAC) address, identifies the computer on the network.

                                          Modem: A device that allows computers and other devices to connect to the
                                          internet.  It converts digital  data  into  analog signals for  transmission  over
                                          telephone lines and vice versa.

                                                                                                  Networks Around Us   9

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