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3.1.1 Network Resources - Describe networks by their scope: LAN, WAN and…
3.1.1 Network Resources - Describe networks by their scope: LAN, WAN and MAN
WAN - Wide Area Network
Expensive to set up therefore many companies will purchase the use of a pre-existing WAN rather than set up their own.
Biggest WAN - Internet Back ATMs are connected to a WAN to allow the machines to communicate with the user's
Advantages
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Users have the capability of accessing a vast and diverse range of multimedia resources and services
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Made up of telephone lines, radio and satellite links, all run by the local public providers.
Definition Computers are linked across cities and even countries and are connected by telephone lines and/or radio waves.
Disadvantages
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Additional security is needed to prevent such attacks, for example by installing a firewall
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Key Characteristics
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Transmission Errors - Greater chance of an error occurring as packets of data are being sent over longer distances
Ownership - Parts of the structure will often be owned by other people, often quite a number.
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Connection Method - Can be coaxial cables, twisted cables, fibre optic cables or radio waves. They will also make use of telephone network systems, leased lines and sometimes satellites
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