ICT revision

Just key terms and definitions of the subject overall.

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  • Created by: zoe88
  • Created on: 07-01-16 09:42
Encoding
Converts data into machine readable form
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Coding
Changes original data into short version (e.g yellow is Y)
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Standard
A standard is a way of doing something, for example storing data in a particular format or transferring data in a predetermined way
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De Facto Standard
Not legally binding, not used for all but is very common practice to use
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De Jure Standard
Legally binding standards that all manufactures must use. Often starts as a De Facto.
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Example of De Jure standards:
ASCII, Unicode, Wi-Fi, TCP/IP Internet protocol.
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Example of De facto standards:
QWERTY keyboard, USB ports, GIF formats.
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Considerations when designing an user interface:
Age, Experiance, Physical Condition, Environment and task to be undertaken
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Types of protocols:
HTTP, IP, TCP, POP3, SSL
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HTTP ( Hyper text transfer protocol)
Set of rules that allow web pages to be transfers to computers.
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IP (Internet Protocol)
Directs data to one computer to another
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TCP (Transmission Control Protocol)
Manages the assembly and reassembly of data into packets transmitted between computers over the internet
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POP3 (Post Office protocol 3)
Manages transfer of emails through computer systems
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SSL (Secure Socket Layer)
Cryptographic system for sending data over the internet
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Advantages of User Interface
Little computer memory, Customisable, no training , Flexible, easy to use, suitable for small devices, Intuitive
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Disadvantages of User Interface
Numerous levels can be fustrating, Difficult for novice, only valid choices can be made, slow to load.
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Standards advantages:
Helps transfer of information through computer to computer, Transfor of data through software, not restricted to buying software and hardware.
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Standards disadvantages
Difficult to change and can be complex for first time users.
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Network
Any situation in which multiple computers are interconnected together via some forms of communications medium for sharing resources and the exchange of data
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Items that can be transferred through networks
Documents, MP3 files, MP4 files, Still images, software, hardware, servers and routers etc.
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Advantages of networking
Sharing devices can be very cost effective, data is easy to backup as all the data can be stored on a file server, files can easily be shared, software is also cheaper.
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Disadvantages of networking
Managing a large network can be very complicated and requires training, danger of hacking, viruses, purchasing cables are expensive.
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LAN (Local area network)
LAN is a network of which connects computers and other devices in a relatively small area, typically a single building or a group of buildings.
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WAN(Wide area network)
Telecommunications network of which spreads across a large geographical area, Wide area network joins computers together over long distances. They can be joined by many systems like the public telephone system, fibre optic cables, satellites or other
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MAN(Metropolitan are network)
A metropolitan area network (MAN) is a network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large local areaThe term is applied to the interconnection of networks in a city into
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Internet:
a global computer network providing a variety of information and communication facilities
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WWW
an open source information space where documents and other web resources are identified by URLs, interlinked by hypertext links, and can be accessed via the Internet.
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Intranet
A local or restricted communications network, especially a private network created using World Wide Web software. Uses internet protocol technology to share information, operational systems, or computing services within an organisation.
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Extranet
An Intranet that can be particularly accessed by authorized outside users, enabling businesses to exchange information over the internet in a secure way. Website that allows controlled success to partners, vendors or an authorised set of customers.
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Other cards in this set

Card 2

Front

Changes original data into short version (e.g yellow is Y)

Back

Coding

Card 3

Front

A standard is a way of doing something, for example storing data in a particular format or transferring data in a predetermined way

Back

Preview of the back of card 3

Card 4

Front

Not legally binding, not used for all but is very common practice to use

Back

Preview of the back of card 4

Card 5

Front

Legally binding standards that all manufactures must use. Often starts as a De Facto.

Back

Preview of the back of card 5
View more cards

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