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Alternative communication systems: -
a. Client-Server: -
A very popular form of distributed processing which splits the required processing between
=clients‘and =servers‘. The client is normally the user interface between a user and a desktop
computer, workstation or a laptop computer. The user interacts with the user interface to
enter or receive data or carry out some form of calculation or analysis of data. The server
provides the client with the services required and may be anything from a super computer,
mainframe or another desktop computer, usually with a large amount of additional RAM
and hard disk capacity.
The subdivision of the processing function and the allocation of storage depends on the
requirements of each application. Generally all or the majority of the data storage is in the
server whilst the application logic may be split between the server and the client, the precisedivision depending on the application and asynchronous data transmission speeds. In some
applications more in the client and in other applications more in the server.
b. Internet: -
A world-wide network of interlinked networked computer systems enabling the exchange of
information between individuals and organisations on a global scale. Connection to the
internet is made through Internet Service Providers (ISP). The internet has no ownership
and no formal management organization.
There are number of internet tools for communication such as e-mail, news groups etc.
Information retrieval where access to library catalogues, corporations, governments, and
non-profit organisation databases is possible. The World Wide Web (WWW) is a universally
accepted standard of storing, retrieving, formatting and displaying information using a client-
server architecture.
c. Intranet: -
By the use of internet technology, organizations are creating internal networks for use within
an organisation on an enterprise basis. Intranets use internet standards of connectivity and
software developed for the WWW on the existing organisational network. As a result the
networked applications can run on many different kinds of computers in use in the
organisation giving greater flexibility of hardware. Intranets are private to the organisation
and are protected from the public internet by firewalls which are security systems with
specialized software to prevent outsiders from gaining access to the private network.
d. Extranet:-
Extranets are a mixture of internet and intranets whereby an organisation allows outside
people or organisations limited access to their own private internal intranets. Extranets are
useful in linking an organisation with its customers or business partners allowing them to
access such items as stocks levels, products and prices.
gregorymasila answered the question on February 15, 2018 at 15:53
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