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Cloud hosting services are services provided on virtual servers to the websites that they pull computing resources from physical web servers underlying networks. It follows the computing model of utility available as a service than a product and is comparable with gas and electricity, the traditional utilities. The clients can tap into such services depending on the website demands and can pay for what they use.

Cloud hosting has vast servers network and this is mostly pulled in different locations from different data centers. Practical cloud hosting examples are categorized under the (PaaS) Platform as a Service and (Iaas) Infrastructure as Service classifications.

Under IaaS offerings the client is offered virtualized hardware resource so that they can install the software environment they require, before building web application. However, on a PaaS service, the client is provided with software environment, on which they can directly install and develop their web application. Nevertheless, businesses with complex experienced IT professionals and IT infrastructures may opt for more customizable IaaS model, but normally, may prefer the PaaS option that is easy.

Cloud hosting involves using public cloud models and these ensure your data is kept safe and suffices the website installations. Conversely, businesses can turn to cloud hosting if privacy and security is your major concern as they use ring-fenced resourced location on the site.

A typical cloud hosting delivers the following benefits that are the salient features:

· Reliability. It is not hosted on a single physical server; instead the website is on a virtual partition to draw the resources from an extensive underlying network of physical servers for its disk space. If a server is offline, the resource level obtainable to the cloud may be very scarce, but will show no effect on the website whose server pursues pulling resources from the balance network of servers. In fact, the cloud platforms survive and keep the entire data center moving, owing to pooled cloud resource that is drawn from various data centers in varying locations.

· Physical Security. The physical underlying servers are housed within data centers and thus benefit with security measures that the facilities implement to safeguard people from disrupting or accessing them on site.

· Flexibility and Scalability. The resource is available on demand in real-time and is not restricted to the server’s physical capacity or constraints. In case, a site of a client demands additional resource from the hosting platform owing to some visitor traffic or new functionality implementation, the resource is seamlessly accessed. Using a private cloud model, means the service is allowed to burst so that resources are accessed from the public for non-sensitive processing if there is on-site activity surge.

The most visible advantages with cloud hosting is that the client pays for only that they use actually and the resource is available anytime in demand, besides there is no wasted capacity left unused. The load balancing is based on the software and thus it can be scalable instantly to react to the changing demands.

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Source: http://ezinearticles.com/?An-Overview-of-Cloud-Hosting&id=9591228