Write a short note on Cloud Computing.

Cloud computing is a technology of distributed data processing in which some scalable information resources and capacities are provided as a service to multiple external customers through the internet technology. It allows storing, accessing data and programs using the internet. There are broadly three types of clouds one can access:

1. Public Cloud — It is defined as a public or common cloud service provided to multiple users on a network. Public cloud services are provided through a common portal or virtual platform owned and operated by a third party cloud provider.
2. Private Cloud — Private cloud is a virtual private interface provided by an individual or owned by one organization.
3. Hybrid Cloud — Hybrid cloud combines public and private clouds together by technology that allows data and applications to be shared between them.

Cloud computing further consists of services such as:

1. IaaS (Infrastructure as a Service) — A computer infrastructure is typically presented in the form of physical and virtualized resources that provide consumers with the basic building blocks needed to run applications and workloads in the cloud.
2. PaaS (Platform as a Service) — An integrated platform for the development, deployment, testing and support of web or mobile applications.
3. SaaS (Software as a Service) — The business model of software license and software upgrades involves the development and support of the software vendor.
4. DaaS (Desktop as a Service) — It involves delivering virtual apps and desktops to end-users over the internet.