![]() For example, D-Subminiature or D-sub connector is a commonly used serial port, which carries RS-232 signals. ![]() In this port, the rate of transmission of data is one bit at a time through a single communication line. This type of ports provides an interface to connect to peripheral devices using a serial protocol. Generally, they are four to six in number and present on the back or sides of the computer.īased on the type of protocol used for communication, computer ports can be of two types: Serial Ports and Parallel Ports. It is also called a communication port, as it is the point where you plug in a peripheral device to allow data transfer or communication between the device and computer. So, it acts as an interface or a point of attachment between computer and external devices. A port is a connection or a jack provided on a computer to connect external or peripheral devices to the computer, for example, you will need a port on your device to connect a keyboard, mouse, pen-drives, etc.
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