networking curriculum
support CD for senior
secondary studies

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networking > why set up a network? > internet provision

Sharing Resources and Services

Centralised Internet provision

Can you imagine a large organisation in which each of its hundreds of computers has a modem connected to the Internet? The cost of modems and phone lines would be massive, and it would be a nightmare to set up and maintain each Internet connection.

Instead, an organisation can have one high-speed connection to the Internet that is shared by all network users. It only needs to be set up in one place, and its use can be monitored and controlled.

Since it is common for several users to download the same material from the Internet, a common service on networks is a proxy server that caches (stores) recent downloads. If another user requests the same download, the proxy server provides the file immediately from its cache, rather than slowly downloading it again. This makes Internet access cheaper for the organisation and faster for its workers.

worksheets
. history
. why network
. osi model
. connecting
. protocols
. technology
. topologies (tla)
. issues
. network types
. design
. economics
. economics (cs)
   - solutions -

quizzes
. why network
. osi model
. connecting
. protocols
. technology
. topology
. issues
. network types
. design
. economics

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