A.                 Services Layers of CC

CC has a three-level service model that includes “Software as a Service” (SaaS), “Platform as a Service” (PaaS) and “Infrastructure as a Service” (IaaS). As represented in figure 1, each of these models has distinctive characteristics and features.

Figure 1: Service layers of CC

“Infrastructure as a Service” (IaaS) is the lowest level of the service model of CC. it focusses on providing a computational infrastructure to enhance the storage and processing capacities. IaaS is embedded on virtualising engines of the computing resources. Few examples of IaaS are: “Amazon Elastic Cloud Computing” (EC2) and “Elastic Utility Computing Architecture Linking Your Programs to Useful Systems” (Eucalyptus) [6]. IaaS allows organisations to translate the CC into their existing IT infrastructure rather than acquiring a new IT framework. This feature helps businesses to maintain the most relevant and required computing system with the ability of improvements.

The second tier of CC model, “Platform as a Service” (PaaS) is the conceptual model of “Common Name” CN. It offers ‘software development platforms’, operating systems and programming languages [7]. It makes application, development and translation easier or the businesses to manage its programming and frameworks efficiently. Lastly, the upper tier of CC, “Software as a Service” (SaaS) represents the applications supported by the cloud environment [8]. These applications and software are easily available on the internet. It allows portability and cost-efficiency. Few examples of SaaS are Facebook, Google Docs, and Microsoft Office.

B.                 Deployment Models of CC

Further, in this research article, the deployment models of CC are discussed. Figure 2 represents the four main deployment models which are: hybrid cloud, private cloud, public cloud and community cloud. These models support the implementation of cloud services models. Each of these models acquires distinct characteristics presented in the figure below.

Figure 2: Deployment Models of CC

Firstly, private cloud is defined as the cloud infrastructure that is solely used by the organisation that owns it. It provides access control and privacy to the confidential information of organisations. It is the largest and detailed cloud model that offers strict control over the organisation’s resources. In contrast to the public cloud offers shared resources of an organisation. The public cloud is highly used in covering the harmonising requirements such as security policies and usage flexibility [9]. Moreover, a community cloud is the moderate shared cloud infrastructure that shares the access to an organisation’s information to those users who share common interests. The community cloud especially used in the cases of cooperation networks that shares common interests as well as the costs of employing and maintaining cloud. However, the top-most cloud model used by organisations is the hybrid cloud. Hybrid cloud model manages complex configurations of the two clouds. It is believed to have demanding cloud environment, and difficult to achieve by SMEs [10].

C.                 Article Highlights

This research article approves that most of the SMEs which are not related to the IT industry have increasingly adopted cloud computing to support its computer services and information system. The SMEs that are not IT companies have now become more focused on its core business. However, it is universally agreed by most of the organisations that managing information system plays a crucial role in an organisation’s success and competitiveness. With the use of advanced information system, organisations have greatly benefitted in managing, sharing, storing and retrieving data easily and timely. This article highlighted the issue that how SMEs requires cloud computing, even when these SMEs does not relate to the IT industry. It is collectively approved that cloud computing is an ultimate technology that supports IT infrastructure of businesses. For SMEs, cloud computing can be helpful if the SMEs transfers its technology infrastructure to the third party (supplier of technological cloud) who can manage the information framework on behalf of SMEs. Cloud computing offers SMEs efficient management, development and scalability of information infrastructure. Like most of the companies, SMEs also gives importance to technology and technological advancements to cope up with the evolving world. Thereof, SMEs are more likely to worry about its IT system management and operations for which they do not have sufficient capabilities. Also, SMEs worries about the overheads that required to pay for data management on the monthly or yearly basis. To this, cloud computing offers SMEs a contracted service partner that is efficient and affordable in storing and retrieving the data and resources when needed. Certainly, cloud computing cannot support organisations to its fullest. Most of the important internal resources of a business are confidential which are required to be managed by the businesses. For this, cloud computing offers private cloud capabilities which are managed solely by the businesses. For those SMEs who do not have either profile, not resources for themselves to manage, they do not require such hi-tech computing systems in their regular operations.

Another important feature of CC addressed in this article is the challenges attached to the cloud computing implementations. This research article highlighted a few challenges like legal and security issues which cannot be completely avoided by the businesses but managed to a certain extent through controlling public and private clouds effectively. Even though there are laws and policies that govern where the information will be stored which decides the information reliability. However, these laws vary country to country, that can influence the laws of country organisations’ information located in and the cloud service it uses.

Conclusion

Cloud computing is a developing technology that is progressively becoming a part of the various field in our lives. The multi-faceted cloud computing and an increasing number of platforms and technologies have led CC to become a global technology in several fields. Moreover, due to the limitations of CC, businesses avoid using the complex features in its existing technologies and information systems. From this research article, it is evident that cloud computing is an unavoidable technology system that highly advantageous for every business. This research article highlighted the characteristics and models which can be helpful while deciding upon its implementation. For those businesses who wish to have an affordable, easy and advanced information system, cloud computing offers the best solution.