Slides in this set
Local Area Network (LAN) network in a small
geographical area (e.g. Within a building)
Wide Area Network (WAN) network over a large
geographical area (e.g. Several sites in a country or across
the world)…read more
Costs associated with a
·Network maintenance costs (upgrades,
·Hardware costs (cables, routers)
·Cost of third party communication lines (BT,
·Software costs (network operating systems,
network management software)…read more
Types of networks
·Client-server network where several
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
·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