Technically speaking, he said that there were three types of cloud computing services that are commonly put to use: infrastructure as a service, platform as a service and finally, software as a service. With the first mentioned cloud computing service, Parsik says, clients have access to virtual servers in the third party service provider’s data centre, which can be used any way we want.
In this case users have to install their own software and also be responsible for maintaining it. This option gives the users enough flexibility and scalability says Parsik. Another feature is that if a user needs 3-4 servers to run his systems, and needs 50 during the holiday season, he will not have to buy more servers but can just rent the additional servers on the cloud system.