One of the significant innovations that cloud technology has brought with its emergence is the As-A-Service model. The perfect fusion of traditional IT infrastructure, platform, software and data as well a plethora of other sub-categories with the cloud has a lot to offer to the businesses.

However, each of the three prime members of the as-a-Service clan - IaaS, Paas and SaaS - has its own unique benefits to offer. Scalability is one such attribute that is common among all. Let's start with Infrastructure-as-a-service (IaaS), sometimes also referred to as Hardware as a Service.

IaaS model can be effectively utilized by users based on the utility billing model. This platform enables an organization to contract out servers, networking components hardware, software etc to a third party for supporting its operations. The service provider owns the equipment and is responsible for operating and maintaining it. Some of the pertinent features associated with Iaas model are - Internet, virtualization, utility billing model and scalability of resources etc.

PaaS is an effective cloud computing environment that provides rapid development, running and management of applications. Platform as a service is an effective tool to lease operating systems, hardware, and network capacity over the Internet. This computing platform allows the customers to hire virtualized servers and its accompanying services for operating the existing applications or for testing the new ones.

SaaS, commonly referred to as web based services, refers to the software delivery method, wherein an access is provided to the software and its functionalities with the help of remote access. Saas facilitates the users to pay on a monthly basis. Moreover, there is no need for the users to invest in procuring additional hardware. Thus, it frees the client from the need of handling installation, set- up and daily maintenance of the software.

In a nutshell, would say that redefine your IT infrastructure in an efficient manner simply by opting for the right type of cloud model that fits in well with your ongoing business requirements.