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Bandwidth

                  The capability of a transmission  medium  to  transmit  the maximum  amount  of data  from one
                  computer  to  another  over a  computer  network  in a  given  amount  of time  is  called  bandwidth.
                  A bandwidth is generally in bits per second (bps) or Bytes per second (Bps), Kilobytes per second
                  (Kbps) and Megabytes  per second  (Mbps). There can be  various  types  of bandwidths  which are

                  network bandwidth, data bandwidth or digital bandwidth.

                          Let’s CatCh uP


                    Write the names of any four network terminologies.
                    1.  _______________________                    2.  _______________________

                    3. _______________________                     4. _______________________





                         DEVICES REQUIRED FOR A NETWORK


                  There are various types of devices such as Network Interface Card (NIC), Hub, Switch, Router, Modem,
                  Network Cable and Gateway. Let us discuss about these in detail.

                       Network Interface Card (NIC)

                  It is an expansion card which provides the network access to a computer. It allows
                  the computer to connect to a network through a wired or wireless medium.


                                                    Hub or Switch                                            NIC
                                              It is hardware device that has various boxes to which the computers,
                                              printers and other networking devices are connected. The main function
                                              of a hub  is  to  direct  information  around  the  network  and  facilitate
                        Hub or Switch
                                              communication between all the connected devices.
                       Router

                  It is a networking device used to connect and facilitate transfer of data
                  in the  form of packets  between  two  network.  It finds best  route  for
                  data packets over the network. It is located at the gateways where two
                  networks connect.

                                      Modem                                                             Router
                                It stands  for MODULATOR–DEMODULATOR.  It is  a hardware device  that  allows a

                                computer to send and receive data over a telephone line. It converts data from digital
                                to analog and vice versa. The process of converting digital signals to analog signals is
                                called modulation. The process of converting analog signals to digital signals is called
                    Modem       demodulation.


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