Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 12 - 2611_SmartGPT Pro V(5.0) C-8
P. 12

    Hub: A device that joins multiple computers to form a single network
                          segment. It forwards data to all connected computers.

                                                         Switch: A device that connects multiple computers within a Local
                                                       Area Network (LAN). It manages data traffic to ensure that data
                                                       reaches  only the  intended  destination.  Unlike a hub, a switch
                                                       forwards data only to the target device.

                         Router: A device  that connects  different networks and directs  data
                         packets between them based on their IP addresses.

                                        Network repeater: A device that boosts incoming electrical, wireless or optical
                                      signals. It amplifies signals to prevent them from becoming too weak or corrupted
                                      during transmission.

                           Gateway: A device that connects dissimilar networks those using different

                         protocols. A gateway takes data from one system, interprets it and
                         transfers it to another system.

                                                     Bridge: A device that connects similar networks, usually LANs using
                                                   the  same  hardware and protocols.  It  reduces  the  traffic  on  other
                                                   network segments as it filters the data based on the MAC addresses

                                                   of the source and destination before forwarding it.

                                        Imagine  computer  networks as highways in the sky. What kinds of vehicles would
                                        travel on these highways and what destinations would they reach?

                                DATA COMMUNICATION SYSTEM

                      Data communication is the process of exchanging data between two devices.

                            Sender                                    Message                                 Receiver

                                                                Transmission Medium
                                   Rule 1, Rule 2, ... Rule n                              Rule 1, Rule 2, ... Rule n

                                         Protocol                                                Protocol
                      There are five main components in a data communication system:

                         Message: This refers to data or a piece of information that is to be communicated.

                       10   Computer Science (V5.0)-VIII

| 7 8 9 10 11 12 13 14 15 16 17 |