Different Definitions For Cloud Computing Essay

Lastly, the Infrastructure as a Service is a kind of cloud computing where the provider gives out basic storage and basic computing capabilities through a standardized form. It is meant to work on workloads by pooling together networking equipment, storage systems, servers, Centre space (Williams, 2012). GoGrid, Amazon and 3 Tera are some of the examples of this platform.

This cloud model promotes availability and is composed of five essential characteristics, three service models, and four deployment models” (NIST 2009).

Cloud computing is an internet based computing which provides various applications and services like storage, servers, infrastructure, networking with low cost, on-demand self service, pay as you go model, location independent resource pooling, reasonable price , rapid elasticity etc. Cloud computing is one way to increase the capacity add capabilities without investing in new infrastructures like computer hardware involves storage memory, licensing for new software, training for a person and in a dynamic way.

There are three standard service models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). IaaS is when the cloud

The National Institute of Standards and Technology defines cloud computing as a model that allows convenient, on-demand network access to a pool of configurable computing resources. These resources may consist of storage, networks, servers, applications, services and so forth that can be quickly provisioned and put into service while requiring a minimum of management effort or interaction by the service provider (Mell & Grance, 2011).

Cloud computing has gained significant popularity over the past few years because of its self service capacity, flexibility, affordability, scalability and its pay as you go service model. You may have also heard cloud computing referred to as the cloud, cloud hosting, cloud server hosting and etc. These terms have been thrown around so much and most do not even know exactly what it means. So what is cloud computing?

The word "cloud" is used to represent the internet and other communications systems. Cloud computing is the result of an evolution of the widespread adoption of virtualization, service-oriented architecture, autonomic, and utility computing in the past, telecommunications companies mainly gave simply dedicated, point-to-point data circuits to their users. Starting from the 1990's, virtual private network services was included in their contributions. It made the telecommunication companies offer equally improved services whereby cutting down on cost as well as using resources effectively.

of organization, are discussed. Characteristics of cloud computing discussed to get idea what the cloud computing is all about using. In addition to that, deployment model of cloud computing is discussed in greater detail to explain cloud computing can be used as public, private or hybrid type. Based on service delivery cloud computing divided into three types Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS) and Software-as-a-Service (SaaS) are explained further in this section.

There are different types of cloud computing services available on the market which falls into one of the following categories.

Cloud services are divided into three model based on the resources or services provided. Figure below shows the service models as layered architecture with the service contents.

Cloud computing alludes to a network of computers, connected through internet, sharing the resources given by cloud providers catering to its user’s needs like scalability, usability, resource requirements. The National Institute of Standards and Technology (NIST) gave meaning of cloud computing, which demonstrates the vast majority of the key components of cloud computing [1]: "Cloud computing is a model for enabling convenient, on demand network access to a shared pool of configurable computing resources (e.g., networks,

In fourth section, the article discusses cloud offering under three types of service models. These are Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). IaaS provides fundamental computing resources (storage, network, processing) as a service where subscribers are able to deploy and run their choice of operating system and software applications. PaaS is the next level of service, where subscribers have an operating system in addition to hardware as a service, and have control over changes in the application and hosting environment. SaaS is the third level of service, in which client get software also as a service in addition to an underlying operating system and hardware. All the services offers pay-as-you-use.

Infrastructure as a Service - IaaS describes a services for provisioning virtualized operating system instances, storage, and network capacity under contract from a

acquiring and managing the underpinning hardware and software, which they then rent out to the users. With IaaS, users can get the same processing power and speed, as well as have access to unlimited storage space. In addition, the cloud as service provides platform as a

Cloud consumers directly use IT infrastructures (processing, storage, networks and other fundamental computing resources) provided in the IaaS cloud.