Cloud computing is a general term for anything that involves delivering hosted
services over the Internet. These services are broadly divided into three categories:
Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS) and
Software-as-a-Service (SaaS). The name cloud computing was inspired by the
cloud symbol that’s often used to represent the Internet in flow charts and
diagrams.
A cloud service has three distinct characteristics that differentiate it from
traditional hosting. It is sold on demand, typically by the minute or the hour;
it is elastic — a user can have as much or as little of a service as they want at any
given time; and the service is fully managed by the provider (the consumer needs
nothing but a personal computer and Internet access). Significant innovations in
virtualization and distributed computing, as well as improved access to high-speed
Internet and a weak economy, have accelerated interest in cloud computing.
A cloud can be private or public. A public cloud sells services to anyone on the
Internet. (Currently, Amazon Web Services is the largest public cloud provider.)
A private cloud is a proprietary network or a data center that supplies hosted
services to a limited number of people. When a service provider uses public cloud
resources to create their private cloud, the result is called a virtual private cloud.
Private or public, the goal of cloud computing is to provide easy, scalable access
to computing resources and IT services.
Benefits of Cloud computing:-
•Reduced Cost
Cloud technology is paid incrementally, saving organizations money.
•Increased Storage
Organizations can store more data than on private computer systems.
•Highly Automated
No longer do IT personnel need to worry about keeping software up to date.
•Flexibility
Cloud computing offers much more flexibility than past computing methods.
•More Mobility
Employees can access information wherever they are, rather than having to remain
at their desks.
•Allows IT to Shift Focus
No longer having to worry about constant server updates and other computing
issues, government organizations will be free to concentrate on innovation.
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