Wednesday 8 October 2014

INTRODUCTION INFORMATION TECHNOLOGY

1.1 DEVELOPMENT OF INFORMATION TECHNOLOGY 


DEFINITION:
Information technology or IT can be defined briefly as the use of computer hardware and software to store, retrieve, and manipulate  information.

STAND ALONE:
  • A desktop or laptop computer that is used on its own without requiring a connection to a network.
     
MAINFRAME:

  •  A large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously.




CLIENT SERVER NETWORK:
  •  An architecture in which the user's PC (the client) is the requesting machine and the server is the supplying machine, both are connected via a network such as the Internet.

DISTRIBUTED COMPUTING:
  • A type of computing which different components and object comprising an application can be located on different computers connected to a network. 





CLOUD COMPUTING:
  • An Internet service that provides computing needs to computer users.



 


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