What is a Port?
a port is physical docking point using which an external device can be connected to the computer.
Characteristics
A port has the following characteristics:
- 1.External devices are connected to a computer
- using cables and ports.
- 2. Ports are slots on the motherboard into which
- a cable of external device is plugged in.
- 3. Examples of external devices attached
- via ports are mouse, keyboard, monitor,
- microphone, speakers etc.
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1. serial ports:
- 1. Used for external modems and older computer mouse
- 2. Two versions : 9 pin, 25 pin model
- 3. Data travels at 115 kilobits per second
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| serial ports |
2.Parallel Port
- 1. Used for scanners and printers
- 2. Also called printer port
- 3. 25 pin model
- 4. Also known as IEEE 1284-compliant Centronics port
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| parallel port |
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3. Universal Serial Bus (or USB) Port
- 1. It can connect all kinds of external USB
- devices such as external hard disk, printer,
- scanner, mouse, keyboard etc.
- 2. It was introduced in 1997.
- 3. Most of the computers provide two USB ports
- as minimum.
- 4. Data travels at 12 megabits per seconds
- 5. USB compliant devices can get power from a
- USB port
usb port
4. VGA Port
- 1. Connects monitor to a computer's video card.
- 2. Has 15 holes.
- 3. Similar to serial port connector but serial port
- connector has pins, it has holes.
vga port
5. Ethernet Port
- 1. Connects to a network and high speed Internet.
- 2. Connect network cable to a computer.
- 3. This port resides on an Ethernet Card.
- 4. Data travels at 10 megabits to 1000 megabits
- per seconds depending upon the network
- bandwidth.
ethernet port
6.Firewire Port
- 1. Transfers large amount of data at very fast speed.
- 2. Connects camcorders and video equipments
- to the computer
- 3. Data travels at 400 to 800 megabits per
- seconds
- 4. Invented by Apple
- 5. Three variants : 4-Pin FireWire 400 connector,
- 6-Pin FireWire 400 connector and 9-Pin FireWire
- 800 connector
firewire port
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