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Dallam School ICT Department
Info 2: Revision
Handbook

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Contents



Contents ..................................................................................................................................................................................................... 2
An ICT System and its components .................................................................................................................................................... 3
Data and Information.............................................................................................................................................................................. 4
People and ICT Systems ......................................................................................................................................................................... 6
Transfer of Data in ICT Systems .........................................................................................................................................................10
Safety and Security of Data in ICT Systems ....................................................................................................................................14
Backup and Recovery ...........................................................................................................................................................................17
What ICT can provide ...........................................................................................................................................................................19
Factors affecting the…

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An ICT System and its components
What you need to know:

1 What is ICT?
2 ICT System
3 Components of an ICT System


ICT is the use of technology for the input (1), storage (1), processing (1) of data and the output of information. (1)

ICT System An ICT…

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Data and Information
What you need to know:

1 Different forms Data can take
2 Data
3 Information
4 How data can arise
5 Reasons for coded data
6 Factors that affect quality of information
7 Encoded data


Forms of Data ­ Moving images, text, sound, Numbers, Pictures/still images

Data…

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Questions:

Complete the table below to show the different forms that data can take. The first has been done
June 2012
Qu 2




for you.


Using the example of a supermarket checkout, explain the difference between data and
Qu2
Jan 2012




information.


Figure 2 below shows a camera which is…

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Before this data is entered into a data processing system the customer' s gender is coded as M or
Jan 2010
Qu3a


F and their age group is coded as 1, 2, 3 or 4. Why is this data coded before it is entered?


When the coded data is entered…

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Effective ICT team - One characteristic is the appropriate allocation of a team member to a task (1) to utilise the
strengths of team member (1) e.g. send a networking specialist to solve a problem relating to a network server.
(1) The team must have adherence to agreed standards (1)…

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A national supermarket chain surveyed their customers and found that 10% of shoppers who left a
Qu 6a
June 2010




store without making a purchase said that excessive waiting time at the checkout was the reason
for their decision. The chain has decided to introduce self-service checkouts. The self service…

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ICT professionals often work in teams. Describe, with the aid of examples, the characteristics of an
Jan 2009 5c


effective ICT team.


You have been asked to design a mobile phone for older users. What would you need to consider
Qu6a
Jan2009




when designing the user interaction with this mobile…

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Transfer of Data in ICT Systems
What you need to know:

1 Types of processing and examples
2 Elements required for a network
3 Standards
4 Media used to transfer data across a network
5 Characteristics of local and wide area networks
6 Characteristics of the WWW and the Internet…

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