Computer - Memory Units

Computer - Memory Units

Memory unit is the amount of facts that can be stored inside the storage unit. This garage potential is expressed in phrases of Bytes.

The following table explains the main memory storage units −

S.No. Unit & Description

1

Bit (Binary Digit)

A binary digit is logical 0 and 1 representing a passive or an energetic state of a factor in an electric powered circuit.

2

Nibble

A group of 4 bits is called nibble.

Three

Byte

A institution of 8 bits is called byte. A byte is the smallest unit, which could represent a statistics object or a individual.

Four

Word

A laptop phrase, like a byte, is a set of fixed number of bits processed as a unit, which varies from computer to computer however is fixed for every pc.

The length of a pc word is called phrase-length or word duration. It may be as small as eight bits or may be as long as 96 bits. A computer stores the statistics in the form of laptop words.

The following desk lists a few better storage gadgets −

S.No. Unit & Description

1

Kilobyte (KB)

1 KB = 1024 Bytes

2

Megabyte (MB)

1 MB = 1024 KB

three

GigaByte (GB)

1 GB = 1024 MB

four

TeraByte (TB)

1 TB = 1024 GB

five

PetaByte (PB)

1 PB = 1024 TB 

 

Computer - Ports

A port is a bodily docking point the use of which an external device can be linked to the laptop. It can also be programmatic docking factor through which data flows from a application to the laptop or over the Internet.

Characteristics of Ports

A port has the subsequent characteristics −

External devices are connected to a pc using cables and ports.

Ports are slots at the motherboard into which a cable of outside device is plugged in.

Examples of external devices attached via ports are the mouse, keyboard, monitor, microphone, speakers, and so on.

 

Let us now speak a few crucial forms of ports −

Serial Port

Used for outside modems and older computer mouse

Two versions: nine pin, 25 pin model

Data travels at one hundred fifteen kilobits per 2d

Parallel Port

Used for scanners and printers

Also known as printer port

25 pin model

IEEE 1284-compliant Centronics port

PS/2 Port

Used for antique computer keyboard and mouse

Also referred to as mouse port

Most of the vintage computer systems provide two PS/2 port, each for the mouse and keyboard

IEEE 1284-compliant Centronics port

Universal Serial Bus (or USB) Port

It can join all sorts of external USB devices which includes external tough disk, printer, scanner, mouse, keyboard, etc.

It became delivered in 1997.

Most of the computer systems provide  USB ports as minimum.

Data travels at 12 megabits according to seconds.

USB compliant gadgets can get strength from a USB port.

VGA Port

Connects screen to a computer's video card.

It has 15 holes.

Similar to the serial port connector. However, serial port connector has pins, VGA port has holes.

Power Connector

Three-pronged plug.

Connects to the laptop's power cable that plugs into a energy bar or wall socket.

Firewire Port

Transfers large quantity of statistics at very fast pace.

Connects camcorders and video gadget to the computer.

Data travels at four hundred to 800 megabits in line with seconds.

Invented via Apple.

It has three variations: 4-Pin FireWire four hundred connector, 6-Pin FireWire 400 connector, and 9-Pin FireWire 800 connector.

Modem Port

Connects a PC's modem to the phone network.

Ethernet Port

Connects to a network and high velocity Internet.

Connects the network cable to a computer.

This port is living on an Ethernet Card.

Data travels at 10 megabits to 1000 megabits according to seconds relying upon the network bandwidth.

Game Port

Connect a joystick to a PC

Now changed through USB

Digital Video Interface, DVI port

Connects Flat panel LCD screen to the pc's high-cease video image cards.

Very popular among video card manufacturers.

Sockets

Sockets join the microphone and audio system to the sound card of the laptop.