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Factors that will influence
choice of network
·Cost of network
·Size of organisation
·How system will be used
·Existing systems
·Performance required
·Security issues…read more

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Measures of network
·Cost…read more

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Costs associated with a
·Staffing costs
·Network maintenance costs (upgrades,
adding terminals)
·Hardware costs (cables, routers)
·Training costs
·Cost of third party communication lines (BT,
·Software costs (network operating systems,
network management software)…read more

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Types of networks
·Client-server ­ network where several
Client Client
computers are connected to one or more
servers. Usually a more powerful computer
Client Client is used as the central computer because
computers in client-server network are not
the same status.
Client - Server network
·Peer-to-peer (P2P) ­ network where each computer
is of equal status.
Peer-to-peer network…read more

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·Advantages ·Disadvantages
·Better security ­ because centralised & ·More expensive ­ servers are more
only one person responsible for it. expensive.
·Centralised data ­ data all held on file ·Need specialist knowledge ­ need person
server so all users have access to same who understands technicalities of network
set of data. in charge of network.
·Back-ups taken centrally ­ regular ·Software is sophisticated and expensive ­
backups taken by network manager so data network operating systems are expensive.
and programs less likely to be lost. Larger client-server networks it may be
necessary to buy network management
·Faster access to programs and files ­ software.
servers used, which is a powerful computer
so whole network runs faster. ·If server breaks down ­ renders network
unusable until it can be repaired.
·Centralised administration ­ all
administration of network (e.g. Allocation of
usernames and passwords, help etc)
performed centrally so users don't have to
worry about it.…read more

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