Networking Components                              A network card is used to physically                            attach a computer to a network so                            that it can participate in network                            communication. The Ethernet                            Network card is the most used.                             Modern Ethernet cables use twisted-                           pair cables, containing eight wires.                           These wires are arranged in a special                           order and an RJ-45 connector is                           crimped at both ends.
Networking Components                                             A modem enables you to                                           connect your computer to                                           the available internet                                           connection over the                                           existing telephone lines. It                                           converts the digital signals                                           of a computer into analog                                           signals to enable their                                           transmission via phone                                           lines. At the destination,  the receiving modem further converts the analog signal  into a digital signal so that the data can be understood at  the receiving end.                                              What is a network device                                            that is used to connect all                                            the computers in a                                            network with each other.                                            When a computer sends a                                            request in the network, it                                            is first sent to the hub by  the cable. The Hub then transmits that request to all the  other computers in the network, which check whether the
Networking Components              message belongs to them or not. If not, then the message is            proper. This process is called broadcasting.                                            A switch works like a hub. However,                                          unlike a hub, the switch does not                                          broadcast the message on the                                          entire network period. It transmits                                          the message from the source                                          computer to the destination                                          computer by only using the physical  address. This way, the switch provides a direct connection between  the source and destination. As a result, the speed of the network  increases.                                                   A router is a device that                                                 connects two different types                                                 of networks with each other,                                                 for example, a LAN with WAN.                                                 Apart from transmitting the                                                 messages on the network                                                 from a source computer to the  destination computer, a router also provides the best suitable route  to deliver that message.
                                
                                
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