WHAT IS A NETWORK? NETWORK PRINTERS
LAN & WAN NETWORKS NETWORK SECURITY
WHAT IS A FILE SERVER?
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A network is a system that sends
and receives data and messages
enabling two or more computers to
communicate with each other.
Networks typically allow computers
to share files, share printers and
send messages to each other.
A network contained within one building or
site is called a Local Area Network (LAN).
A network that spans several sites across a
city, country or even the world is called a
Wide Area Network (WAN).
A Client/Server network may be a LAN or
WAN, however a peer-to-peer network can
only be a LAN. What is a Client/Server
The most famous and widely used Wide
Area Network is the Internet which contains
many thousands of servers and many
millions of clients right across the world.
File servers store the files that are created
by the network users. They also store
applications such as word processing
programs, spreadsheets etc.
Users can access parts of a file server's
hard disk which will appear as an extra
drive on their own computer. Applications
can either be run from the fileserver, or
they can be downloaded to the user's
In addition, the fileserver often runs the
network software which controls the
Most school networks use a
Laser Printers use a laser beam
and dry powdered ink to produce
a fine dot matrix pattern. This
method of printing can generate
about 4 pages of A4 paper per
The standard of print is very good and
laser printers can also produce very
good quality printed graphic images
Networks store their files centrally on a file server.
This makes it much easier to maintain security than
with a large number of stand-alone computers with
the files saved on their own hard disks.
Security is maintained by ensuring that users have
login names and passwords and are restricted to
files and directories for which they have clearance.
One important aspect of security is the regular
backing-up of important files. This can easily be
done when files are centrally stored.
There are several types of
consist of two kinds of servers, for example file servers
computer. The clients which store and distribute files
are usually computer and applications, and print
workstations sitting on servers which control printers.
the desks of employees
in an organisation. The Client/Server networks need
servers are usually client software which is installed
more powerful on the workstations and in
computers and are held addition, they also need server
in a central location or software such as Windows NT®
locations within an Server or Novell Netware®.
organisation. Click here to see an example
A Computer Network