University of Madhya Pradesh
Cloud computing is a colloquial expression used to describe a variety of different types of computing concepts that involve a large number of computers that are connected through a real-time communication network (typically the Internet). The characteristics of cloud defined by the NIST (National Institute of Standard And Technology) are on demand self-service, broad network access, location independent or resource pooling, rapid elasticity, measured services. The services provided by the cloud are SaaS (Software-as-a-Service), PaaS (Platform-as-a-Service), IaaS (Infrastructure-as-a-Service). The essential software used in creating an effective and efficient cloud is Hadoop.