Do You Know About Ports
Ports are used to connect external devices to the computer. These are the connecting points of various devices to the computer. These exist several types of ports like serial, parallel, USB, and AGP.
1.Serial Port: They transfers data serially a bit at a time. The serial port needs only wire to transmit 8bits. The disadvantage is that it takes 8 times longer to transmit a byte. Also, it is necessary to send a start bit before each byte of data, a stop bit after the byte to mark the end of byte and a parity bit to help check the integrity of data. They come in the form of 9-pin or 25-pin male connector. Serial ports are often known as communication (COM) ports or RS232C ports. The are typically used to connect devices like mouse and modem.
2.Parallel Port: They can send or receive a byte (8-bit) at a time. Unlike the serial port, these 8-bits are transmitted parallel to each other. They come in the form of 25-pin female connector. This are popularly used to connect printer, scanner, CD writer, zip drive, external hard disk disk, tape backup drive, etc.
3.USB(Universal Serial Bus) Port: To spare the user botheration of 8-pin, 25-pin, male, female connectors, the USB has been designed. It gives you a single, standardized, easy-to-use to way to connect a variety of devices to a computer. These devices include printer, scanners, mice, joystick, digital camera, web cameras, etc.
4.AGP : The Accelerated Graphics Port is used to connect to graphics card that provides high-speed video performance typically required in games and other multimedia application. You should more about AGP.
5.Infrared port: They enables the device such as PC or laptop to send and receive data from electronic devices wirelessly and by using a beam of infrared light.
You Should also know about Hard Disk.