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Router

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


                               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 demodulation.
                 Networking Cable

                 It is also known as ethernet cable, is a transmission medium that allows
                 you to transport  information from one computer to another.  There  are

                 various  types  of  networking  cables,  such as coaxial  cables,  twisted  pair
                 cables, and optical fiber cables.
                                                Gateway

                                                It is a network device that allows data to flow between two different
                                                networks, which may use different protocols. It collects data that is
                                                to be sent from one computer, converts it into small packets, and

                                                then sends them to another computer.



                     TYPES OF NETWORKS
                 Different types of networks can be classified on the basis of the geographical areas they cover.

                 There are five types of networks as follows:

                 LAN (Local Area Network)

                 LAN is a digital communication system that interconnects
                 a large number of computers and other peripheral devices
                 within a radius of less than 1 km. This type of network is
                 usually preferred for a smaller area such as a residence,
                 school, laboratory, university campus, or office building.
                 By using LAN, users can exchange data and messages in
                 an easy and quick way. Cables and communication devices
                 are used to connect computers to the LAN.

                 MAN (Metropolitan Area Network)

                 MAN  consists of    two  or  more  local  area  networks  or
                 campus area networks that usually span several buildings in the same city or town.



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