The Cloud Of Cloud Computing

Cloud computing offers services to users based on on-demand self-service, broad network access, measured service, resource pooling and rapid elasticity; These characteristics promise a faster time for implementation, lower cost, superior scalability and a better end user satisfaction. These services are delivered in models known as Software As A service (SaaS), Platform As A Service (PAAS), and Infrastructure As A Service (IAAS). The first layer which is the Software As A service (SaaS) is the layer in which software applications are delivered to end users. Below is the Platform As A Service (PAAS) layer which offers a platform on which applications can be developed. The lowest layer is the Infrastructure As A Service (IAAS) layer, in this layer the physical servers and network infrastructure is offered as a service. These services can be deployed throughout the internet (Public Cloud Computing), on the intranet infrastructure, (Private Cloud Computing), in a shared community of private networks (Community Cloud Computing), or a hybrid of both (Hybrid Cloud Computing). The service deployment models are [8]:

Cloud computing describes anything involving the delivery of hosted services over the Internet. The service takes it names from the cloud symbol used to represent the Internet in flowcharts and diagrams. Due to significant innovations in virtualization and distributed computing, along with improved access to high-speed Internet and a weak economy, interest in cloud computing has increased substantially in recent years (TechTarget, 2007).

Cloud computing enables you to get to your information and projects outside of your own processing condition. Instead of putting away your information and programming on your PC or server, it is put away in 'the cloud'. This could incorporate applications, databases, email and record administrations.

Public cloud service is a service that is open to anyone who has access to Internet is a potential user. Public cloud service can be further divided into application, platform and infrastructure. Software as service (SAAS) “transfer programs to millions of users through browser. In the user 's views, this can save some cost on servers and software. In the provider 's views, they only need to maintain one program, this can also save cost” (Wang, June 2011). Google Apps and Zoho offices

Cloud computing can be defined as a model for enabling pervasive, convenient, on-demand network access provided to users to provide a shared pool of configurable computing resources. Networks, Storage, services, and applications make a part of these network sources. (Mell & Grance, 2011). In general terms, cloud computing can be stated as the process by which the users with the help of a web browser over the internet can remotely access data and program applications. A few characteristics of cloud computing are:

Software as a Service (SaaS): In this service provider provide an applications to consumers over internet.

Cloud computing is one of the most useful technology that is been widely used all over the world. It generally provides on demand IT services and

SaaS is an application level cloud service that provides interface software and database. User simply accesses the software running on the back-end server of the cloud clients such as web browsers, emulators and mobile web browser, and use the services. The best example of this services is a web-based email service. Users are able to send or receive emails from web browser remotely without installing or running email software on his/her device. The essential software are running on the Cloud Computer which allow user to access the desire resources from any supported devices.

Under the Introduction section, the authors have emphasized about the importance of Cloud Computing by describing Computing as the fifth most commonly used utility. Cloud Computing is a new computing paradigm in which computing resources are provided as a

Cloud-based applications—or software as a service (SaaS)—run on computers in the cloud that are owned and operated by others. These computers connect to users’ computers via the Internet and, normally, a web browser. There is no software to purchase, install, update or maintain. This is handled by the service providers. By using the internet browser, applications, and data are accessible from any connected computer. Because access is through the web browser, data is in the cloud. This prevents any data from being lost if there is any issue or problem with the

Cloud computing system, which functions based on the concept of providing computing as a utility, can be defined as the method of providing resources for computing on demand, using remotely operational servers on the internet for data storage, processing data and managing data. Its equivalent to using a computer for its services, only without having to carry the hardware for it. Cloud applications, being dynamically scalable, agile and capable of running virtual applications and even an OS on a browser help in reducing costs of resource acquisition.

provides different types of services by utilizing pool of resources mainly hardware, software, database, network, in terms of pay-for-use basis as per specific Service label agreement. Cloud Computing is becoming more and more popular at present information technology setup of many large organizations. [2].

Cloud computing is a technology which provides a computing services over the internet. The services and solutions of cloud computing is delivered to the clients through internet. Call it storage service or computing service it is all about delivering these services in real time. Cloud services allows individuals and business to use software and hardware. There are several models that service providers deliver the services to their consumers. Cloud computing service providers model is based on internet that is to say cloud computing is possible only through internet. Providing services or solutions over the internet has a huge significance because of the fact that the deployment or development is on real

Over the years, computing concepts changing from distributed to parallel to grid to cloud computing. The evolution of computing is shown in Figure 1. Now a day, people choose cloud computing because of the advantages they get from cloud computing. The advantages are scalability, reduced management efforts, on-demand resource allocation and flexible pricing model (pay-as-you-go). Cloud computing has three service models: Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS) and Infrastructure-as-a-Service (IaaS). The basic concept of cloud computing and services is shown in Figure 2. Example of application or services using cloud computing are Microsoft OfficeLive, Dropbox, CluodNumbers, Google AppEngine, SalesForce

Cloud Computing is the use of common software, functionality or business applications from a remote server that is accessed via the Internet. Basically, the Internet is the "cloud" of applications and services that are available for access by subscribers utilizing a modem from their computer. With Cloud Computing, one simply logs into desired computer applications - such as sales force or office automation programs, web services, data storage services, spam filtering, or even blog sites. Generally, access to such programs is by monthly or annual paid subscription. Through Cloud Computing, businesses may prevent financial waste, better track