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In order for reliable usage of the cloud, the cloud computing environment needs to consist of all the foundations and supporting devices of IT. These include networks, which can enable the smooth processing of applications and services. The Cloud Computing Environment (CCE) delivers a single point of access to the user, which can be used to access computing resources, infrastructure, services and applications. It also enables the business to respond rapidly to changes in the market or technologies [21].

The public cloud computing system includes a restricted class of servers, storage devices and networks. Amazon’s EC2 offers small, large and extra-large classes of servers, although the extra-large server seems to be of no match to any of the enterprise class servers in data centers.

To achieve powerful computational resource, one has to upgrade the system using powerful servers and CPUs to increase speed. However, this can require additional servers, which require more storage and network bandwidth. To exploit this, the applications may need to partition workloads to run on multiple instances sharing the same computer architecture. But many class applications are not suitable for such an environment and still depend on traditional methods of creating spare space to meet additional workloads. This contradicts the gains from clouds and affects its flexibility [22].

From the user’s point, cloud computing usability can be complicated as the usage of computing resources might be dependent on multiple businesses, as they own these resources which include public and private clouds and virtual resources with no enterprise control [23].