1.1 Computer Hardware Flashcards
what is computer hardware?
the physical parts attached to a computer
what is an input device?
a device that allows data such as text, images, video or sound to be entered into a computer
what is an output device?
how an output is created by the computer
examples of input devices
• mouse - highlight, select and edit text
• keyboard - enter characters
• microphone - input sound
• controller
examples of output devices
• monitor - show visual display
• printer - print physical documents
• speakers - output sound
• headphones - output sound
• plotter - draws complex drawings
examples of input/output devices
• headphones with a microphone
• touch screen monitors
types of monitors
LCR (liquid crystal display)
- flickers
LED
- less power, more expensive
Touchscreen
what is resolution?
the number of horizontal and vertical pixels on a monitor
what is a smartphone (communication device)
small computer that functions as a telephone
what is a laptop (communication device)
mobile computer
what is bluetooth (communication technology)
enables devices to communicate using radio frequency technology
what is an infrared device (communication technology)
the transference of data wirelessly
what is a biometric device
a device that uses a human characteristic as part of a security mechanism
- improved security
- expensive
process of connecting to the internet
device
switch
router
modem
ADSL
ISP
what does a switch do
connect devices without wifi connection
what does a router do
connects devices to the internet
what does a modem do
converts data signals from digital to analogue and analogue to digital
what is ADSL
carries analogue data long distances
what is ISP
internet service provider
what is a hybrid
a modem and router combined
