What are the computer interface ports ?

Computer ports provide the input and output interfaces the device needs to connect to the computer. A computer port is also called as a Communication Port as it is responsible for communication between the computer and its peripheral device.

Generally, the female end of the connector is referred to as a port and it usually sits on the motherboard.

  • Serial ports – round-shared connection points for serial cables.
  • USB ports – rectangular-shaped connection points for USB cables.
  • Ethernet ports – square-shaped connection points for Ethernet cables

Here is the list of popular computer ports –

1. Serial Ports

PS/2 – PS/2 connector is developed by IBM for connecting mouse and keyboard.


DB-25 –It is also called parallel port and used to connect to parallel printer port.


RS-232 or COM Port – serial communication between the computer and it’s peripheral.


Audio Ports – It is the most commonly found audio port that can be used to connect stereo headphones or surround sound channel.


2.Video Ports

VGA Port – VGA port is the main interface between computers and older CRT monitors.


Digital Video Interface (DVI) – DVI is a high speed digital interface between a display controller like a computer and a display device like a monitor.


Mini-DVI – Mini-DVI port is developed by Apple as an alternative to Mini-VGA port and is physically similar to one. It is smaller than a regular DVI port.


Micro-DVI – Micro-DVI port, as the name suggests is physically smaller than Mini-DVI and is capable of transmitting only digital signals.


Display Port – Display Port is a digital display interface with optional multiple channel audio and other forms of data. Display Port is developed with an aim of replacing VGA and DVI ports as the main interface between a computer and monitor.


RCA Connector – RCA Connector can carry composite video and stereo audio signals over three cables. Composite video transmits analogue video signals and the connector is as yellow colored RCA connector.


Component Video – Component Video is an interface where the video signals are split into more than two channels and the quality of the video signal is better that Composite video.


S-Video – S-Video or Separate Video connector is used for transmitting only video signals. The picture quality is better than that of Composite video but has a lesser resolution than Component video.


HDMI – HDMI is an abbreviation of High Definition Media Interface. HDMI is a digital interface to connect High Definition and Ultra High Definition devices like Computer monitors, HDTVs, Blu-Ray players, gaming consoles, High Definition Cameras etc.


3. USB

Universal Serial Bus (USB) replaced serial ports, parallel ports, PS/2 connectors, game ports and power chargers for portable devices.



USB Type C  – USB Type – C is the latest specification of the USB and is a reversible connector. USB Type – C is supposed to replace Types A and B and is considered future proof.


4. Ethernet ports

RJ-45 – Ethernet is a networking technology that is used to connect your computer to Internet and communicate with other computers or networking devices.


RJ-11 -RJ-11 is another type of Registered Jack that is used as an interface for telephone, modem or ADSL connections. Even though computers are almost never equipped with an RJ-11 port, they are the main interface in all telecommunication networks.


e-SATA – e-SATA is an external Serial AT Attachment connector that is used as an interface for connecting external mass storage devices. Modern e-SATA connector are called e-SATAp and stands for Power e-SATA ports.


I have tried to list down all the common computer ports and please let me know if you need more information about the computer ports and write your comments below.


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