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It routes the data packet to its proper destination address. It also allows any computer to further forward these
                   packets to another computer.
                   TCP has to make sure that all packets reach their destinations in order/sequence and if some packets are
                   missing they are resent.
                   HTTPS:        yper  ext  ransfer  rotocol  is a protocol which is used for secure data transmissions between a
                   web client and a web server. It is an extended version of      as it has a SS   Secured Socket  ayer  certificate.
                   It ensures the encryption of data while sending and decryption of data at the receiving end. It is less prone to
                   hacking.
                .   rite any five features of Online transaction.
              ns.   he following are the features of online transactions:
                     It is secure and convenient.
                     It is digital so transaction details can be retrieved if required.
                     Marketing and promotion methods are better.
                     It is safe as it is cashless and has payment security.
                     It is not limited to a fixed local area and has a global reach.
                     It is suitable for impulsive buyers.
                6.  Name the device that converts digital signal to analog that can travel over phone lines.   [CBSE Sample Paper, 2022]
             Ans.  MODEM

                7.  Networks in which certain computers have special dedicated tasks, providing services to other computers (in the
                 network  are called networks.                                               [CBSE Sample Paper, 2022]
             Ans.  Client server
                 .   ist any   advantages associated with networking.                        [CBSE Sample Paper, 2022]
              ns.  Four advantages are :
                   Data Sharing Files Transfer

                   ardware Sharing.
                   Internet Access Sharing
                  Usage of network based applications
                 .   ifferentiate between wired and wireless access.  ive one example for each type.   [CBSE Sample Paper, 2022]

              ns.    wired setup uses physical cables to transfer data between different devices and computer systems.   wireless
                 network does not use wires for data or voice. For example,

                    ired:  ial-up   S  or  able Internet  ccess etc.
                    ireless: 3G or WiMAX or Wi-Fi
                  .  hat do you understand by IS  with respect to web applications  Name any two connection types that home users
                 use.                                                                        [CBSE Sample Paper, 2022]
              ns.   n Internet service provider  IS   is an organi ation which provides you with access to the Internet via a dial-up
                  using modem  or direct  hard wired  or wireless connection.  S   cable modem  dial-up  broadband wireless
                 WiMAX etc.

                11. Rahul and Amit are working on a school project assigned to them by their teacher. They have to send instant messages
                 to each other and also do video conferencing after school hours in order to complete the project on time.

                 a.  Suggest any 4 good instant messaging software that they can use.
                 b.  Apart from computers, list 4 hardwares that Rahul and Amit need for videoconferencing.
              ns.  a.  oogle  alk    ahoo  Messenger   Skype    indows  ive Messenger    ediff  ol  MS- eams   OOM etc.
                   b.   eadphone  Speaker   Microphone    eb  amera



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