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•  Audio  Port: It is used to  connect external  speakers,  headphones,
                                          microphones, and other external audio devices.



                  •  Ethernet Port: It is used to connect the network cable to the computer.


                                         Sound Card

                                         A sound card is a hardware part of the computer system. It is located
                                         inside the CPU box and is used to convert the sound into digital data and
                                         vice-versa. It allows a computer to play music with the help of an output
                  device like a speaker. A sound card has audio ports through which we can connect the speakers
                  and headphones to the computer.

                  Video Card

                  A video card is an expansion card. It is used to convert digital data into
                  video form and vice-versa. After converting the digital data into video, it
                  displays the output on the display devices like monitors and TVs. A video
                  card is also used to improve the quality of the pictures and videos. It has
                  processing as well as storage capability.

                  External Hardware Components

                  The hardware components that are located outside the CPU box are called external hardware
                  components. As these components are connected to the computer externally, they are also called
                  peripheral components. External hardware components can be classified into three categories:


                                                  External Hardware Components





                                Input Devices              Output Devices               Storage Devices


                  Let us discuss these in detail.
                  Input Devices


                  A computer accepts data and instructions from you through input devices. Data can be in the
                  form of numbers, text, sound, or graphics.
                  Some of the input devices are:
                                                  •     Keyboard: It is a standard input device. It is mainly used to
                                                      type text and to send the instructions to a computer with the
                                                      help of keys. Keyboard keys are the buttons that represent
                                                      alphabets, numerics, alphanumerics and special characters.








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