client to server and peer to peer networks

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Client to server and peer to peer networks
Client to server network
Found in medium to large organisations
All computers are connected by a switch
Access through username or password, swipe card, fingerprint recognition
Needs one computer to act as a server which stores files, backups,
application sharing, printer management
Provides user access to: storage space, printers, files and software
Large organisations often have more than one server carrying out a specific role
Software managed centrally
Backups taken of all data on server
If server fails, users loose access to data
Requires specialist technical staff
Powerful computer that performs functions on behalf of the clients connected to
it. The size and functionality of network dictate number of servers required'
File server- stores files available on the network and has storage areas set
aside for each user. Can have shared files that are available to certain
users. Examples of a shared area could be: student- all users on the
network can read any files stored in this area. Geography- only geography
staff can make changes to the files.
Application server- stores software across the network. It stores software
so it can be run from the application server by a client computer. Also it is
used for storing software installation files so that software can be
deployed to client computers.
Mail server- manages all email for an organisation. It receives all incoming
emails and allocates them to their appropriate inbox. Only allows authorised
users to access their own mail boxes. Mail server also: checks all incoming
emails for viruses, filters out any spam emails, provides a central address
book for the organisation, sets limits to the size of email boxes, holds
Proxy server- manages access to the internet within an organisation.
Functions include: store web pages that have been visited in a cache so that
the next user to visit web pages stored in the cache will have faster access
to them, firewall that examines all data coming in to the network and blocks
access to unacceptable internet access, filter access to web pages so that
undesirable web pages are blocked.
Print server- manages access to printers within a LAN. Print jobs are sent
by client computers to the print server where the print job is processed,

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Other functions
include: prioritise print jobs so that urgent ones can jump the queue, charge
users for each print job, restrict the number of pages that can be printed
at once to a printer, restrict access to certain printers so they can only be
used by specific users, provide reports of who printed what.
Backup server- backup all data on a network so individual users don't have
to back up their own data.…read more

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Set up easily by reasonably competent person
No reliance on single server ­ if network fails only shared resources lost
Network traffic minimal as resources provided by each computer
Each user responsible for back-ups
Anti-virus has to be installed on each computer
All processing done by each computer ­ may take longer to complete
The user has to use the same computer each time in order to access data or
Security ad-hoc ­ confidential files may be compromised.…read more


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