ICT REVISION

There are three types of peripherals: storage devices, output devices and input devices.
Output devices allow the user to see or hear information after it has been processed. 
Storage Devices allow the user to store data. For example, computers contain high capacity hard disk drives to store terabytes of data. 
Input devices allow the users to give instructions and input data to the device. 

Examples of input devices:

• touch sensitive jog dial; this is used for simple actions such as skipping a song
• mouse; this is used for pointing and inputting device
• keyboard; this is used to enter text
• game controller; this is used for gaming
• webcam; this is used to input visual data, it can either be a peripheral or built in
• touch screen; this is an input device controlled by either a finger or a stylus
• microphone; this is used to input audio data, it can either be a peripheral or built in
• joystick; thi is used for gaming or used for controlling devices for example robots or CCTV cameras
• graphics tablet; this is used to input drawings
• scanner; this digitises printed documents and an 'Optical Character Recignition' (OCR) can turn text into an editable format

Examples of output devices:

• speakers; this can either be a peripheral or a built in device allowing you to hear audio output
• docking station; this amplifies audio output of small devices and it also charges the device
• headphones; this allows just one person to hear audio output
  
• printer; this allows you to produce a 'hard copy'
• headset;this combines microphones and headphones to input and output audio data
• screen; this is an inbuilt display screen, for example a laptop and a smartphone, or a monitor

Examples of storage devices:

• hard disk drives
  
• USB flash drive/memory stick; plugs into the USB port and can store up to 256GB
• secure digital card (SD); this can store up to 4GB
• micro SD cards; this is used for smaller devices
• an extended capacity card (SDXC); this can store up to 2TB
• a high capacity card (SDHC); this can stpre up to 32GB
  

Digital devices are able to connect to each other and share data. You need to understand the types of connection and how devices exchange data.

DATA CABLE CONNECTION
The most common method of data cable connection is a USB cable. Most mobile phones and media players can connect by USB cable to a computer running the correct software.

Digital devices are able to connect to each other and share data. You need to understand the types of connection and how devices exchange data.

BLUETOOTH

• Bluetooth is a technology allowing devices to communicate with each other wirelessly. They communicate over short distances using radio waves.
• Most modern devices are bluetooth enabled or a bluetooth dongle can be attatched to a computer as a peripheral.
• Devices can connect to bluetooth-enabled peripherals such as printers or speakers.

Digital devices are able to connect to each other and share data. You need to understand the types of connection and how devices exchange data.

WI-FI

• Wi-Fi is another method of wireless communictaion using radio waves
• Wi-Fi enabled devices can communicate over long distances
• most modern devices are Wi-Fi enabled
• Wi-Fi allows devices to connect with a computer network and the internet
• Wi-Fi allows devices to connect to Wi-Fi enabled peripherals such as printers, speakers, scanners and digital projectors

This is when two devices, such as a media player and a computer, are connected they can automatically exchange data. This is known as synchronisation.

Cloud synchronisation
A cloud synchronisation allowspeople to store everything on a remote server. This means that they can access all of their data from all of their digital devices.