system unit

In The Name Of Allah The Most

Merciful And The Beneficient

Name : Afifa Amjad Roll No : BS-Zoo-14-009 Topic :1.USB Port 2. Firewire Port 3. Bluetooth Port 4. SCSI Port 5. eSATA Port 6. IrDA Port 7. MIDI Port 8. Port Replicator and Docking Station 9. Buses

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USB Port

•A USB Port can connect up to127 different peripherals together with a single connector._You can attach multiple peripherals using a single USB Port with a USB hub

Fire wire Port•Previously called IEEE 1394 Port.•Can connect multiple type of devices requiring faster data transmission.• 3 Latest versions 1. Fire wire 8002. Fire wire 16003. Fire wire 3200

• Fire wire Hub : Can attach multiple devices to a single fire wire port.

• Supports Plug and Play.

Bluetooth Port• Use Radio waves to transmit data .•Maximum distance should be 33 feet between two devices.

•Bluetooth devices have small chip.

•Computers not having Bluetooth technology use 1. Bluetooth wireless port adapter2. Bluetooth PC cards3. Express card Module

SCSI Port (Small Computer System Interface)

•Special high speed parallel port.•Allows you to attach peripherals such as disk or printers.•Newer type: SAS(Serial Attached SCSI)•Transmits much faster than parallel SCSI.•Connect 7 to 15 devices together.•Some computers include a SCSI Port others have a Slot that support SCSI Port

eSATA Port (External Serial Advanced Technology Attachment)

•Allows to connect eSATA hard disk to computer.• SATA hard disks are popular because of their fast data transmission speeds.

• eSATA connection provide 6 times faster data transmission speeds than external hard disks attached to computer’s USB. or Fire wire Port.

IrDA Port (Infrared Data Association)

•Both Computer and device must have IrDA Port.•These Ports confirm to standards develops by IrDA.

•IrDA Port of computer and device must align.

•Fast-Infrared Port: A high speed IrDA Port.

Serial Port•Connect System Unit and device by transmitting data one bit a time.

•Modems that connectsystem unit to telephone lines use serial port.

•Telephone lines expects.

• The data in specific frequency.

MIDI Port (Musical Instrument Digital Interface)

•Special type of serial port.• Connect system unit to musical instrument.• Defines how devices represent sound electrically.

• Synthesizer: A chip creates sound from digital instructions.•Systems with MIDI Port have capability to record sounds created by synthesizer and then process sound to create new sounds.•Almost every sound card support MIDI standard.

Port Replication and Docking Station

“External device provide connection to peripheral through ports built into device is called Port Replicator”

“External Device attaches a mobile computer, contain a power connection and provides connection to peripherals;

include slot for optical disc, memory card etc. is called Docking Station”

Buses•Transfer bits from Input Devices to Memory, from Memory to Processor, from Processor to Memory, from Memory to Output Device.

•Two Parts(a)Data bus: Transfer actual data(b) Address Bus: Transfer information where data should reside in memory.

•Width of bus determines number of bits transmit at a time.•Word Size: Number of bits the processor can interpret and execute at a given time.•Speed of bus is measured in Hertz.(1MHz;1 million ticks/second)•Types of Buses(a) System Bus(Front side bus) A part of Motherboard and connect processor t main memory.(b)Backside bus: Connect processor to cache.(c)Expansion bus: allows processor to communicate with peripherals

Name : Hafsa Ijaz Roll No :BS-Zoo-14-004

Topic : 1 For Buying A Personal Computer

2 Parallel Processing 3 Data Representation

UOG Sub Campus Narowal

For Buying A Personal Computer

Features :Great processing Performance.Compatable To Mother Board

Parallel Processing“A method that uses Multiple Processors to

perform a single program or Task”

Require special software to divide a task

Data RepresentationHuman speech is analogue, for it uses continuous signals( wave form) Computers are Digital, have 2 state

ON = 1

Off = 0

Name : Aqsa SattarRoll No :BS-Zoo-14-010Topic: Expansion Busses Bays Power Supply

Keeping Your Computer and Mobile Devices clean

Expansion Buses

Types:The PCl bus The PCI Express (PCIe) The Accelerated Graphics Port (AGP)The USB (universal serial bus) PC Card

Bays

‘A bay is an opening inside the system unit in which you can install additional equipment.’

A bay is different from a slot on the motherboard

Types of bays: A drive bay An external bayAn internal bay

Power Supply

The power supply is the component of the system unit that converts the wall outlet AC power into DC power.

AC adapter: AC adapter is an external power supply.

Keeping your Computer and Mobile device clean:

Can of compressed air Lint-free antistatic wipes and swabs Screen cleaning solution Small computer vacuum Antistatic wristband Small screwdriver