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1.  Assertion (A):  Fault diagnosis and correction is easy in case of star topology.
              Reasoning (R):  In star topology, multiple nodes are directly connected to the central server.
           2.  Assertion (A):  Extension of network is easy in case of bus topology.
              Reasoning (R):  In star topology, all nodes are connected to a central cable, called backbone.
           3.  Assertion (A):   Large business, educational institutions connects their different branches in different locations across the
                          world through WAN.
              Reasoning (R):  WAN connects computers and other LANs and MANs spread across the world.



                Case-based Questions



           1.    CareTaker is an NGO with its head office at Mumbai and branches located at Gurugram, Kolkata and Madurai. It is planned
              to have an Operational Centre at Gurugram that will liaison with the head office and all the branch offices. The NGO has
              received a grant from the central government for setting up the network. The physical distances between the branch
              offices and the Operational Centre and the number of computers to be installed in each of these branch offices and the
              head office are given below. As a network expert, suggest the best possible solutions for the queries raised by the NGO
              (questions (a) to (d).


                                                                        Mumbai Head
                                                                           Office


                        Operational
                     Centre Gurugram
                                                                                          Branch Office
                                                  Branch Office                              Kolkata
                                                    Madurai


              Distance between various locations in kilometres:

                       Location                                         Approximate Distance ( in kms)

                       Mumbai HO to Gurugram Operational Centre                    1450
                       Mumbai HO to Kolkata Branch Office                          1690

                       Mumbai HO to Madurai Branch Office                          2690

                       Gurugram Operational Centre to Kolkata Branch Office        1450

                       Gurugram Operational Centre to Madurai Branch Office        1810
                       Madurai Branch Office to Kolkata Branch Office              1720

              Number of computers installed at various locations are as follows:


                                           Mumbai HO                      2000
                                           Gurugram Operational Office    1200

                                           Kolkata Branch Office          590

                                           Madurai Branch Office          1100




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