Computer hardware pt2

Question 1

Plotter

Answer 1

Machine that is used for accuracy on big drawings and is used for things such as graphs or charts. It is efficient and accurate but is big and expensive.

Question 2

Printer

Answer 2

Used to produce copies of different types of data such as images. Has low long term cost and is eco friendly but has a high power consumption and initial cost

Question 3

Scanner

Answer 3

Converts data such as images into digital form that the computer can read and store. It is convenient and has better quality but is time consuming and has limited functionality

Question 4

Sensors

Answer 4

Physical devices that communicate with another device e.g. a motion sensor sending a signal to a computer. It is accurate and provides real time analysis but is expensive with a limited lifespan

Question 5

Speakers

Answer 5

Devices where electronic signals that are converted to soundwaves that can be heard as audio. It is easyto use and allows more people to hear it clearly but can cause noise pollution and irritation.

Question 6

Terminal adapter

Answer 6

Enables the computer to link to the ISDN (Integrated service digital network) . It is reliable and convenient but is big and wires are easily loosened.

Question 7

Touchscreen

Answer 7

Inputs and receives information from an external device. Quick and easy to learn but can have higher power consumption.

Question 8

Visual display unit (VDU)

Answer 8

It shows data from the computer, It is cheap and modern VDU’s take up less space but the screen is limited in size and is sensitive

Question 9

Wireless network card

Answer 9

Allows device to wirelessly connect to a network. It offers mobility and is cheap but has limited bandwidth and is a security risk.

Question 10

Wireless router

Answer 10

Changes internet signal into a wireless signal which devices on a network use to interface with each other. It is easy to set up and manage but has limited bandwidth and is a security risk.