how cloud computing work practically and how much it is feasible?

pavan: how cloud computing work practically and how much it is feasible?
lots of i am hearing about cloud computing now a days.
i googled but not found one good example.
can you explain how it works in simple way.

Answers and Views:

Answer by Zarn
Cloud computing works fairly well in practice, and it is very feasible. It isn’t really a new idea – grid computing is the older term for something very similar or identical to cloud computing. Here’s a good example of an introductory article for cloud computing: https://webtrends.about.com/od/enterprise20/a/cloud-computing.htm

In a simple way? If you buy access to computing resources ‘in the cloud’, virtual machines are created that you get access to as if they were physical machines, in which you do your computing. Basically. Of course, data lock-in is a major factor in cloud computing, as is the transfer of honking big data sets.