Shikha Nema, Shailendra Singh Raghuwanshi
Cloud computing refers to the delivery of computing resources over the Internet. Cloud computing is a diverse technological concept that is consequence of decades of research in parallel computing, virtualization, networking and communication, utility computing and Service-Oriented Architecture (SOA). Cloud services allow individuals and businesses to use software and hardware that are managed by third parties at remote locations. It offers an on-demand and scalable access to a shared pool of resources hosted in a data centre at providers’ site. It reduces the overheads of up-front investments and financial risks for the end- user. The qualitative services and lower cost of services are the key requirements of this technology. Owing to the financial nature of use of the cloud services based on Service Level Agreements (SLA) makes these issues even more serious that needs to be taken care of. This work presents an overview, style and actuality of cloud computing with the objective of presenting challenging issues concerned with various aspects of cloud computing
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