INFO 2 - 4. Transfer of Data in ICT Systems

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  • Created by: Andrew
  • Created on: 19-01-17 18:36
Differences between LAN and WAN
LAN -> small area, inside institutions / WAN -> large areas, global networks (internet)
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Real life example of LAN
School network
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Real life example of WAN
School network on a split site
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Real life example of distributed network
Bank network including teller computers and ATMs
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Why are networks used?
Allows sharing of resources
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Disadvantages of p2p networks in large organisations
Cost a lot / workstations have to store all data on that machine
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Describe communications devices
Allows communication between devices - e.g. router
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Describe networking software
Enables operation and management of network e.g. a browser
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Describe data transfer media
Most common media used for transmission of data are cables e.g. ethernet
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Explain the internet
A worldwide network of interconnected computers that send and receive information
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Explain the world wide web
A way of accessing information stored on websites. Web browser software is used to access files through the use of HTTP.
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Describe what an Intranet is and why it's useful
Collection of web pages only accessible to employees of a particular company. Allow for better communication between colleagues.
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Describe what an extranet is and an example of it's use
Part of an intranet accessible to people outside the company e.g. customers accessing details of previous orders
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Pros and cons of client/server networks
+ easier to maintain and backup as it's done centrally / - require a dedicated server so can be expensive and complicated
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What is TCP/IP used for?
Controlling the transmission of data
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Difference between de jure & de facto
de jure are formally introduced by committee and are legally binding e.g. TCP/IP - De facto is opposite e.g. PDF
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Benefit of de jure & de facto
de jure - minimisation compatibility issues / de facto - popular with users already
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Other cards in this set

Card 2

Front

Real life example of LAN

Back

School network

Card 3

Front

Real life example of WAN

Back

Preview of the front of card 3

Card 4

Front

Real life example of distributed network

Back

Preview of the front of card 4

Card 5

Front

Why are networks used?

Back

Preview of the front of card 5
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