Cloud computing

  Cloud computing  Cloud computing  is the on-demand availability of  computer   system resources , especially data storage ( cloud storage ) and  computing power , without direct active management by the user. The term is generally used to describe  data centers  available to many users over the  Internet . Large clouds, predominant today, often have functions distributed over multiple locations from central  servers . If the connection to the user is relatively close, it may be designated an  edge server . Clouds may be limited to a single  organization  (enterprise clouds [1] [2] ), or be available to many organizations (public cloud). Cloud computing relies on sharing of resources to achieve coherence and  economies of scale . Advocates of public and hybrid clouds note that cloud computing allows companies to avoid or minimize up-front  IT infrastructure  costs. Proponents also claim that cloud computing...