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ict revision (Network Technologies (world wide web, internet and intranet,…
ict revision
Network Technologies
LAN and WAN
LAN: a LAN (local area network) is spread over small geographical area such, as a building
WAN: a WAN (wide area network) is spread over a large geographical area on a global scale and requires a telecommunications link to all computers on the network to communicate.
what is a network?
A network consists of a number of computers linked together by using either cable or wireless technology
world wide web, internet and intranet
each website consists of a number of websites developed using a web authoring language such as html (hypertext markup language)
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to allow webpages to be accessed using the internet, they require a communications protocol known as http (hypertext transfer protocol)
an intranet is similar to the internet, but is managed by an organisation and only authorised users, with a username and password, can access the content
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webpages are inter connected using hyperlinks, and the first page is called the "home page"
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Data Compression
Data compression is used to reduce file size and at the same time maintain the quality of the data contained in the file.
Reducing the storage requirements of image files and audio files means faster upload and download speeds to and from the internet
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