What exactly is cloud computing? and types of cloud computing

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The cloud is included lots of remote servers that hosted about the on multilple web sites. It does not take delivery of on-demand computing services. Using cloud computing, users can access software and applications from wherever they require, though it may be being hosted by some other party. One benefit of employing cloud-computing services is that firms can steer clear of the upfront cost and complexity of owning and their very own IT infrastructure, and instead simply pay for the things they use whenever they use it. With cloud-computing, you don’t need to make large upfront investments in hardware and spend time and effort on the heavy lifting of managing that hardware.
The main important things about cloud computing are :
1. Trade capital expense for variable expense
2. Stop guessing capacity
3. Go global within minutes
4. Make use of massive economies of scale
5. Increase strength and speed
6. Stop spending money on running and looking after data centers

The key varieties of cloud-computing or say cloud computing services :

Software as being a service (SaaS) –
These services are owned and operated by others which connect to users’ computers online and, usually, a web browser.
Platform as being a service (PaaS) – can be a complete development and deployment environment in the cloud, with resources that permit you to deliver sets from simple cloud-based apps to sophisticated, cloud-enabled enterprise applications.
Infrastructure as a service (IaaS) – Provides companies with computing resources including servers, networking, storage, information center space with a pay-per-use basis.

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