Cloud Services
Software as a service (SaaS)
SaaS is defined as the software distribution model that is deployed on internet in which applications are provided by cloud service provider. It is also known as "on-demand software" or "pay-as-you-go application". Here the customer licenses their product via SaaS-providers. SaaS market is a rapid-growing one; and with this fast growing service SaaS will soon become an active cloud service technology for every organization and companies. So it's important to understand those users and or buyers the usage of SaaS and why it is suitable.
Platform as a Service (Paas)
PaaS is a platform for programming developers and brings the benefits - SaaS is used for, but from the software development point. It is the computer platform that provides the facility to use web applications quickly and with ease, without buying & maintaining web-development PaaS has a similarity with that of SaaS except that SaaS deliver software over the web, whereas PaaS provides a platform for the creating of software, delivered over the web. PaaS has a feature of point-and-click tool that allows non-programmers to develop web applications. App-Engine of Google & Force.com, Windows Azure, AppFog, Openshift and VMware Cloud Foundary are examples of PaaS.
Infrastructure as a Service (Iaa)
IaaS as the name suggests is a way of providing Cloud computing infrastructure such as: virtual machines, storage drives, servers, operating systems & networks, which is also an on-demand service like that of SaaS. Rather than purchasing servers or developing software, clients buys those resources as a fully outsourced service based on their requirement. "Public cloud" is considered as an infrastructure that consists of shared resources, based on a self-service over the Internet. In one word, it is the only layer of cloud where the customer get the platform for their organization to outsource IT infrastructure on a pay-per-use basis.
Network as a Service (NaaS)
NaaS (Network as a Service) allows users to access network infrastructure directly. This service uses the virtualized network infrastructure & provides users & customers with network services in a secured manner. The NaaS providers maintain & manage network resources which decrease the workload of customers/users. It is also based on pay-per-use model.
Identity as a Service (IDaaS)
IDaaS (Identity as a Service) This provides management of employee or user's identity information as digital entity. It minimizes the problem of remembering every different username & password combination or disabling of account when an employee leaves the company.
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