The cloud computing involves three major services. Which are;
· Infrastructure as a service .
· Platform as a service
· Soft ware as a service.
1. Infrastructure as a Service
It is Used by the Sites like Amazon which provides services , virtual server instance API to start and stop, access and configure there virtual servers and storage. Cloud computing allows a company to pay for capacity as much as needed , and bring more online as soon as required. Its preety much as the same Idea used For water, electricity or fuel consumed. This is one of the reason that it is sometimes reffered as utility computing .
2. Platform as a Service
It can be defined as a set of softwares and product development tools hosted on the provider’s infrastructure. Developers create applications on the providers platform over the internet .PAAS providers may use API’s , Website portals or gateway software installed on the customers computer .
3. Software as a Service
In this cloud model , the vendor supplies the hardware infrastructure the software product and interacts with the user through a front end portal . SAAS is very broad market . Servises can be anything from web based email to inventory control and database processing. Shahzaib 1048440
