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Overview of Cloud Computing

By James Powell

Cloud Computing, a computing paradigm is one of the easiest means of accessing and storing data over the Internet, instead of storing data in the computer hard drive. It is also recognized as a large pool of systems that helps us to remain connected with private or public networks and to provide dynamically scalable infrastructure for data, file storage and application.

With the launch of this technology, it significantly abridged the storage of content, delivery, cost of computation, and application hosting. It has a potential of transforming a data center from a capital-intensive set up to a variable priced milieu.

According to one of the research industries - Forrester, defines Cloud Computing as a pool of abstracted, highly scalable, and managed compute infrastructure capable of hosting end customer applications and billed by consumption.

The U.S. National Institute of Standards and Technology (NIST) has developed the definition of Cloud Computing as a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with a minimal management effort or service provider interaction.

The characteristic of Cloud Computing consists of self-service, where a customer can request and manage their own computing resources. An access to the broad network permits service to be available for the private networks or the Internet. This technology provides a pool of shared resources, where the customer draws from a pool of computing resources, usually in a remote data centre.

Cloud Computing Service Models

The services of Cloud Computing are clustered in three categories - Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS) and Infrastructure-as-a-Service (IaaS).

Software-as-a-Service (SaaS)

In this service model, the cloud based applications are offered to the customer, as a service on demand. It is a single instance of the service that runs on distant computers "in the cloud" which are owned and operated by others and gets connected to users' computers via the Internet and, usually, a web browser. Social networking sites like Facebook, Twitter, Flickr and Google are all examples of SaaS, though users able to access the services via any Internet enabled device.

Platform-as-a-Service (PaaS)

The platform-as-a-service (PaaS) model is a level above the Software-as-a-Service setup and provides hardware, network and operating system, so that a customer can design its own application and software.

In order to meet the requirements of the applications such as scalability and manageability, a predefined combination of Operating System OS and application servers is offered by PaaS providers such as restricted J2EE, LAMP platform (Linux, Apache, MySql and PHP), etc., for example, at every stage of the process to develop, test and ultimately host their websites, web developers can use individual PaaS environments.

Infrastructure-as-a-Service (IaaS)

Infrastructure-as-a-Service (IaaS) is a basic computing and storage capability, which is provided by a standardized service over the network. This model has made the workload easier by pooling data centre space, storage systems, networking equipment, servers, etc. together and making them available. In addition to it, the customer can develop and install its own operating systems, software and applications.

Cloud Computing Deployment Models

To make available and to deploy applications, enterprises can choose Cloud Computing on Public, Private or Hybrid clouds. In order to determine the right cloud path for each organization, Cloud Integrators play a vital role.

Public Cloud

By and large, services provided by a public cloud are offered over the Internet and are operated and owned by companies, which use it to offer swift access to reasonable computing resources to other organizations or individuals. Through this deployment model, consumers don't need to purchase supporting infrastructure, hardware or software, which is owned and managed by providers.

Private Cloud

In this deployment model, the infrastructure of the cloud is solely operated for a specific organization and is managed by the organization or a third party. While providing more control of resources and steering clear of multi-tenancy, private clouds exist to take advantage of the various cloud's efficiencies.

Hybrid Clouds

This deployment model of Cloud Computing coalesces both public and private cloud models. A service provider can utilize third party Cloud Providers in a full or partial manner amid hybrid clouds, and thus escalating the flexibility of computing.

Hence, for the everyday computer user, this technology provides numerous options as well as to large and small businesses. And for organizations and individuals, Cloud Computing offers benefits, and the action moves to the interface flanked by multiple groups of service consumers and suppliers.


Cloud Computing with AWS course at Collabera TACT provides training to qualifying professionals and students. It has been established to bridge the demand-supply gap of professionals on SMAC technologies and aims at upgrading the individual's skills and making them future-ready for jobs. Get more information about our all courses see us at Collabera TACT

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