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Networks 2
Descripción
KS4 ICT Mapa Mental sobre Networks 2, creado por Matthew Stentiford el 25/04/2017.
Sin etiquetas
ict
ks4
Mapa Mental por
Matthew Stentiford
, actualizado hace más de 1 año
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Creado por
Matthew Stentiford
hace alrededor de 7 años
10
1
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Resumen del Recurso
Networks 2
Stand alone and networked computers
Stand alone
Less liable to get hacked
No comms with other computers
Need own printer,scanner,software etc
Networked computer
Needs extra protection, ie firewalls
Potential data sharing
Can share printers, scanners, software etc
EPOS systems
item purchased is Idnetified
data sent to main computer
looks through database to find item details
description and price displayed on screen
after all items are processed total bill is calculated
receipt is printed
customer pays with cash or card
Data capture
Barcodes = 13 digits in 4 sections
2 digits for where the item was made
5 digits for manufacturer
5 digits identify the product
1 check digit for verification
Advantaged of barcodes TO CUSTOMER
fewer pricing mistakes
faster service
given itemised recipet that they can check
Disadvantages
Price not found on the item so they must find the place that it lives or a self scan station
scratched or crumpled barcodes take longer and could cause queues
Advantages of barcodes TO SHOP
No price tags needed
automatic stock control
patterns can be analysed
fraud is minimised by switching price tags
Optical mark recognition
detect small marks on paper when scanned
Used in multiple choice exams and lottery tickets
Advantages
Fast method of filling in forms
fats method of reading forms
disadvantages
forms can be large and have too many options
May be filled in incorrectly and cannot be marked
Optical character recognition
reads text and can process it into a word document
Offers fast input of data
Poor accuracy (handwritten)
Machine readable tags
Some items have scanable tags
can be scanned by a machine and update the stock control automatically
Advantages
Automatic stock control update
tags provide a record of daily sales
Disadvantages
customers may damage tags
update at end of day so not always up to date
Portable data entry
PDET can be carried around and scan items
then connected to the computer and updates the stock control
can be wirelessly downloaded
gather data about eh amount of stock availble
log data about items sent away by vans
traffic wardens on setting tickets
Touch sensitive data entry
Input data by touch screen, patients register them selves using them
Low level ICT skills needed
Little possibility of damage or theft
Dirty/scratched can make them hard to use/difficult to read
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