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3.  The text-based addressing system on the Internet is called ................................ .

                4.  A ................................ is a hardware device which provides common connection point to connect several devices
                 together in a network.
                5.  ................................ refers to commercial online transaction that is done on the Internet.

               ns.   .  ase of  ccess             .   M                          .  omain Name System
                    .  ub                        5.  - ommerce

                                                            Section B
                                                   (Subjective Type Questions)
            A.  Answer the following questions:
                 .   rite about any four benefits of network.

              ns.   he four benefits of networks are:
                 i.   Data Sharing: Networking enables sharing of data among computers connected across a network.
                 ii.  File Transfer:  sers can send and receive text files  spreadsheets  presentations  and audio and video files to
                   other users connected to the network.
                 iii.  Resource Sharing:  ardware components like printers  scanners etc.  can be shared among the users connected
                   to a network. It is cost effective  as a single hardware device like a printer or a scanner fulfills the re uirements
                   of multiple users.
                 iv.  Internet Sharing: Sharing a single Internet connection among various computers connected in a network. This
                   type of connectivity is found in schools, Internet cafés, companies, etc.

                2.  Write any three features of WWW.
              ns.   hree features of     are:
                 i.   User Friendly: WWW resources are easily accessible on any Internet-enabled device using a web browser.
                 ii.  Data Sharing:     users can send and receive text files  spreadsheets  presentations  and audio and video
                   files to others.
                 iii.  Interactive: WWW provides a graphical interface which is interactive and easy to use. It facilitates convenient
                    interaction between users and the server using hyperlinks and input boxes like radio buttons, check boxes, text
                    boxes, etc.

                 .   ow data transfer takes place on the Internet
              ns.   here are two main concepts of data transfer on the Internet:
                 i.   Packets: A packet is a small segment of a large message. Each packet contains data and information about the
                   data. The packets are denoted by a ‘header’, so that the receiving machine knows what to do with the packets. The
                   packets are then broken up into smaller packets which are translated into bits and get routed to their destination
                   by devices like routers and switches. On reaching the destination end, they are recognised by the receiving device
                   and arranged in order to use or display.
                 ii.   Protocols: They are the set of rules or conventions to be followed while transferring data in a network. A Protocol
                   includes syntax, which is the format of communication between two communicating entities. Protocols used are-
                 iii.  TCP: It deals with the exchange of data between two communicating entities and the break-up of data into packets.
                 iv.  IP: It deals with routing and addressing data packets so that they reach the correct destination.
                 v.  HTTP: It facilitates the transfer of data between clients and servers using the request-response approach.
                4.  Explain about e-Commerce.
             Ans.  E-Commerce refers to buying and selling of products and services on the Internet. It reduces the burden of
                 establishment of shops and other additional costs.  -commerce is categorised as:
                   B2B (Business to Business): It refers to electronic transactions among business houses.



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