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The information age
­ Made possible by development of telecommunications
­ Modern business dependent upon telecommunications
· Telephone
· Fax
· Various computer links
­ Public lines
­ Private cables
­ Microwave
­ Fibre-optic links
­ Satellite…read more

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Communication systems
The Internet
LAN (Local Area Network)
WAN (Wide Area Network)
The World Wide Web
Electronic bulletin boards
Intranets…read more

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The Internet
Essentially an enormous WAN
­ LAN ­ Local Area Network
­ WAN ­ Wide Area Network ­ connects computers and
networks over a large geographical area
Developed from ARPANet ­ US Department of
Defense late 60s
­ Creators first to see computers as communication
devices rather than just processing devices
No central governing body
No control of content
Continues to grow at phenomenal rate
­ http://www.netsizer.…read more

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The World Wide Web
A collection of pages stored on computers
throughout the world joined by hypertext links.
­ A link may be text or graphics
­ When you click upon them you be taken automatically to
a related web page
Access provided and facilitated by browsers such
as Netscape or Internet Explorer
Creation attributed to Tim Berners-Lee in 1989
­ http://www.wired.com/news/technology/0,1282,31830,00.…read more

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Bulletin Boards
Information exchange and discussion areas
Set up by:
­ Academics
­ User groups
­ Also used for illicit activities such as terrorism
and paedophilia…read more

Page 7

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Essentially a private internet
Set up by companies or schools
­ Allow sharing of information
· Documents
· Databases
· Applications
Microsoft Office software allows businesses
to view documents as web pages…read more

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Electronic mail (E-mail)
E-mail has many advantages over both ordinary mail
and the telephone.…read more

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Disadvantages of e-mail
Easy to overlook
Misuse…read more

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Accessing the Internet
Basic hardware requirements
Telephone line
­ Standard line is cheapest option ­ theoretically up to 56K
bps (bits per second)
­ ISDN (Integrated Subscriber Digital line) 128K bps
­ ADSL (Asymmetric Digital Subscriber Line) 8M bps
downstream, 640K bps upstream
Modem (Modulator/Demodulator) for analogue lines
­ Telephones designed for speech (analogue signal)
­ Modems at either end convert digital-analogue and then
analogue-digital.…read more


Mr A Gibson

This contains some useful information which could be used as initial notes for the topic. Accessible due to the layout and flow of material. Gives some good definitions to dispel common myths.

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