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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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iPlus (Ver. 2.0)-VII

