Private vs Public Clouds
Public
A
public cloud is one in which a service provider serves customers, with
functionality like applications, infrastructure, and storage. These services
are available to businesses and individuals over the Internet. Public cloud
services may be free or offered on a pay-per-usage model; sometimes it’s
referred to with the -aaS acronym, meaning “as a Service” as in IaaS
(Infrastructure as a Service), PaaS (Platform as a Service) and SaaS (Software
as a Service).
Private
The
private cloud describes an internal computing model and architecture which
provides hosted services similar to those of the public cloud, but reserved for
corporate users and those that are approved; essentially, a private cloud is
not open to the public and us usually setup behind a firewall. In a sense, this
turns the IT department into the service provider or vendor for cloud
resources. For those interested in reaping the benefits of virtualized cloud
architecture, yet needing more control and security, this is a popular option.
Virtualization and data
center automation allows for the scalability, maximizing hardware usage, and
flexibility to support internal corporate clients. And, if your organization is
so inclined, metering also allows you to charge departments based on their
usage.
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