Computer - Ports
What is a Port?
is a physical docking point using which an external device can be connected to the computer.
can also be programmatic docking point through which information flows from a program to computer or over the internet.
A port has the following characteristics:
External devices are connected to a computer using cables and ports.
Ports are slots on the motherboard into which a cable of external device is plugged in.
Examples of external devices attached via ports are mouse, keyboard, monitor, microphone, speakers etc.
Following are few important types of ports:
- Used for external modems and older computer mouse
- Two versions : 9 pin, 25 pin model
- Data travels at 115 kilobits per second
- Used for scanners and printers
- Also called printer port
- 25 pin model
- Also known as IEEE 1284-compliant Centronics port
Used for old computer keyboard and mouse
Also called mouse port
Most of the old computers provide two PS/2 port, each for mouse and keyboard
Also known as IEEE 1284-compliant Centronics port
Universal Serial Bus (or USB) Port
It can connect all kinds of external USB devices such as external hard disk, printer, scanner, mouse, keyboard etc.
It was introduced in 1997.
Most of the computers provide two USB ports as minimum.
Data travels at 12 megabits per seconds
USB compliant devices can get power from a USB port
Connects monitor to a computer's video card.
Has 15 holes.
Similar to serial port connector but serial port connector has pins, it has holes.
Connects to the computer's power cable that plugs into a power bar or wall socket
Transfers large amount of data at very fast speed.
Connects camcorders and video equipments to the computer
Data travels at 400 to 800 megabits per seconds
Invented by Apple
Three variants : 4-Pin FireWire 400 connector, 6-Pin FireWire 400 connector and 9-Pin FireWire 800 connector
- Connects a PC's modem to the telephone network
Connects to a network and high speed Internet.
Connect network cable to a computer.
This port resides on an Ethernet Card.
Data travels at 10 megabits to 1000 megabits per seconds depending upon the network bandwidth.
- Connect a joystick to a PC
- Now replaced by USB.
Digital Video Interface, DVI port
Connects Flat panel LCD monitor to the computer's high end video graphic cards.
Very popular among video card manufacturers.
Connect microphone, speakers to sound card of the computer