ICT chapter 3 placemat revision

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  • Created by: lucy.mcx
  • Created on: 03-11-15 18:01
Define the internet-
A global computer network providing a variety of communication and information facilities.
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Describe Dial Up-
a computer system or service used remotely via a telephone line.
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Describe broadband-
A high capacity transmission technique using a wide range of frequencys.
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Describe Cable (Fibre Optic) -
A technology that uses glass (or plastic) threads (fibres) to transmit data.
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Describe Satellite-
An artificial body placed in orbit round the earth or another planet in order to collect information for communication.
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Describe wireless or mobile-
Used to transmit voice, video or data in local or wide areas. There are point to point wireless bridges.
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Define Wireless connectivity-
The term used to describe ant computer network where there are no physical wired connection between sender and reciever.
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Define bluetooth connectivity-
A standard for the short range wireless inter-connection of mobile phones,computers and other electronic deivces.
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Define GIS-
Graphical information system- uses a combination of hardware, software and data to manage, analyse and display all kinds of geographical data.
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Define a dongle-
A small device able to be connected and used with a computer it connects to broadband.
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Define copper cable -
The most common way of connecting from home and many businesses to the nearest telephone exchange.
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Dial Up a&d-
advantages- low price, safe, avaliability disadvantages- unstable dial up connection, demands a phone line, lags behind in speed.
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Broadband a&d-
advantages- you don't need to dial and access number, unlimited access, doesn't affect phone lines. disadvantages- as local uses increase upload times increase, download times increase as the distance for exchange increases, greater risk of hacking
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Cable a&d-
advantages- provide constant high speed link, can be used for tv and interactive services, reliable. disadvantages- expensive installation cost, cables can't reach everybody home.
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Satellite a&d-
advantages- no need for expensive cables, don't need a telephone line. disadvantages- requires a line of sight signal path to satellite, connection and usage costs can be high.
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Mobile a&d-
advantages- easy communication, always connected. disadvantages- greater chance of hacking, connectivity distance is limited.
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Other cards in this set

Card 2

Front

a computer system or service used remotely via a telephone line.

Back

Describe Dial Up-

Card 3

Front

A high capacity transmission technique using a wide range of frequencys.

Back

Preview of the back of card 3

Card 4

Front

A technology that uses glass (or plastic) threads (fibres) to transmit data.

Back

Preview of the back of card 4

Card 5

Front

An artificial body placed in orbit round the earth or another planet in order to collect information for communication.

Back

Preview of the back of card 5
View more cards

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