Page 24 - KEC Khaitan C8.3 Flipbook
P. 24

3.   Convert the following plain text into cypher text using the Rail Fence cipher according to the
                          encryption key that is given. Rail Fence Cipher:
                          (a) Attack from the west, encryption key=3
                          (b) Be honest, encryption key = 2

                          Hint: The Rail Fence Cipher is a classical transposition technique where the plain text is written
                          diagonally in a zig-zag pattern across multiple rails. When the bottom rail is reached, the
                          writing direction switches upwards diagonally, and it changes again upon reaching the top,
                          creating a zig-zag effect.






                                                                                                 21 st   #Communication
                      LAB ACTIVITY                                                            Century   #Technology Literacy
                                                                                                Skills

                      A.  Identify the type of network:
                            (i)                                             (ii)


                                      LAN               LAN






                                               LAN



                                ________________________                        ________________________


                                                     Workstation

                             (iii)                         Server          (iv)            Network


                                                                                              Campus
                                                                                             Area






                                ________________________                        ________________________

                      B.   Visit your computer lab and explore the Internet to identify and gather information about
                          various types of networks. Create a presentation based on the information you collected.



                     FOR THE TEACHER

                    1.  Discuss about Campus Area Network.
                    2.  Explain the advantages and disadvantages of various topologies.
                    3.   Demonstration of the working of a computer network would be helpful. Take the students to the Computer Lab to
                       be shown how resource and file sharing is executed.




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