期刊名称：International Journal of Computer and Information Technology
印刷版ISSN：2279-0764
出版年度：2012
卷号：1
期号：2
页码：185
出版社：International Journal of Computer and Information Technology
摘要：Cloud Computing, the long-held dream of computing as a utility, has the potential to transform a large part of the IT industry, making software even more attractive as a service. Cloud Computing refers to both the applications delivered as services over the Internet and the hardware and systems software in the data centres that provide those services. The services are referred to as Software as a Service (SaaS). Cloud Computing also provides two more types of services i.e. Infrastructure as a Service (IaaS), Platform as a Service (PaaS). With the significant advances in Information and communications Technology (ICT) over the last half century, there is an increasingly perceived vision that computing will one day be the 5th utility (after water, electricity, gas, and telephony). The paper reviews and explores the actual meaning of Cloud Computing, also demonstrates a dissection of the cloud computing into three main layers, and illustrates their interrelations as well as their inter-dependency on preceding technologies. The paper also highlights and discusses the drastic change which Cloud computing has brought and describes its impact on IT Industry.
