ICT Revison

ICT Revision

• ICT GCSE Mock test in December
• Including:
• Systems
• Hardware
• Software
• Data and Databases
• Networks and Communications
• Risks and Implications
• Legal issues
• https://www.youtube.com/watch?v=mKyRbLSeOrI (Embed)
• Caption: Video intro of GCSE ICT

Systems

• What are Systems?
• -An ICT system is a set - up consisting of hardware, software, data and the people who use them. It usually includes communication technology, such as the internet.
• ICT AND COMPUTERS ARE NOT THE SAME THING.
• Computers are the hardware that is often part of an ICT system.
• It is the power of the computers and the communication that allows ICT systems to become so important.
• ICT systems are used in a number of environments, such as:
• -Offices-Shops-Factories
• Also, fields such as:-Farming-Medicine-Communications
• ICT systems can:
• 1) Process a lot of information at a time, and rapidly too
• 2) More productive- can complete a greater number of tasks
• 3) Able to transmit and receive information very quickly
• Three main types of ICT systems are:
• 1) Information Systems: This type of ICT system is focused on managing data and information.
• 2) Control systems: mainly control machines, they use: INPUT, PROCESS and OUTPUT.
• 3) Communication systems: The output of these systems is the successful transport of data from one place to another.

ICT System (diagram)

• 
• Caption: An ICT System

Hardware- External + Internal

• Hardware is the generic term for any part of the computer that you can physically touch, hold, grasp etc.
• External Hardware:
• Hardware are the physical parts that make up the computer.
• The main examples are the mouse and keyboard.. Other examples include: monitor, printer and microphone.
• Internal hardware:
• Internal hardware is what is actually inside the computer.
• Example include:
• -CPU
• -Motherboard
• -Fan
• 
• Caption: Examples hardware

Software...

• What is 'software'?
• Software is a set of instructions which tell both the computer and the hardware what to do.
• The main example of software is an 'operating system'. Such as Windows or IOS.
• An example of what an operating system actually does is:
• Dealing with errors and users instructions.
• Software is A LOT codes telling the computer what to do.
• 
• Caption: Examples of computer software.

Data,,,

• What even is 'Data'?! Data, is words, numbers, dates, images and sounds, without context.
• Data items need to be part of a structure, such as a sentence, in order to give them meaning.
• Data can become information when entered into a table, as an example. E.g. A chefs rota table in a kitchen, just there names is data. When there working hours are put alongside it, it becomes information, as now it has context.
• 
• Caption: An example of data.

Databases!

• A database is a computerized system. It is very useful for searching AND storing data! They are for useful. Especially, to clearly see data you have collected etc.
• For example, a library may use a database to record information like what books have been taken out, and when they must be given back.
• A database should always include a key field.
• A key field is a unique identifier for each record.
• An example of a key field:
• Car REG.
• yh
• 
• Caption: An example of a database.

Networks & Communications

• There are two main types of network:
• LAN- Local are network
• WAN- Wide area network
• LAN: A LAN covers a small area. E.G. One site or building
• WAN: A WAN covers a much larger geographical area, most WAN's are made from several LAN's connected together.
• The internet is a WAN.
• A school network is usually a LAN.
• LAN's are usually connected to WAN's. As a school network is usually connected to the internet.
• WAN's can be connected together using the internet, leased lines or satellite links.