Cloud computing may be a confusing subject because of the number of different businesses offering what they call “cloud computing,” but it's not as complicated as it sounds. There are three types of cloud computing infrastructures, each with its own benefits.

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Cloud computing may be a confusing subject because of the number of different businesses offering
what they call “cloud computing,” but it's not as complicated as it sounds. There are three types of
cloud computing infrastructures, each with its own benefits.
Three types of Cloud Computing
Public Clouds: Always
accessible, but low in
security
The mainstream version of cloud
computing is the public cloud. The public
cloud has been popularized by various
consumer-oriented service providers.
• Public cloud is delivered through a third-
party service provider.
• Public cloud services are billed on a per
use model.
• Services are offered on a self-service
subscription basis and are dynamically
provisioned for customers.
• Customers manage their own services.
• Everything runs over the public Internet,
which means good accessibility but lower
security.
• More ideal for consumers rather than
businesses.
• Have a fairly standardized set of specs with
limited capability to customize
infrastructure.
• Save on opex and have zero capex.
Private Clouds (or virtual
private clouds): Greater
control and security
Private cloud environments take the
benefits of public cloud computing
technologies and place them on a private
network, whether it's hosted internally on
a company's physical infrastructure or by a
third-party service provider.
• Private IPs and firewalls offer greater
corporate data security and privacy.
• Virtual and external private clouds are
delivered through third-party service
providers, usually on a common platform.
• Value-added services like managed
backups and greater flexibility and security
make private cloud services better suited
to business applications than the public
cloud.
• Data security is a priority, so it offers more
peace of mind.
• Greater control over the environment is
available.
Hybrid Clouds:
Best of both
worlds
Most business cloud
deployments today are
being done in hybrid
environments, which
integrate private clouds
with other infrastructures,
whether they are public
clouds or physical systems.
• More complexity means
additional benefits
around enhanced
security and integration.
• Businesses can opt to
put more sensitive data
on physical servers for
increased security but
still get the benefits of
cloud computing.
• Keep costs down by
utilizing existing physical
infrastructure that are
integrated with a private
cloud.
• Application portability
means shifting apps
from the cloud to
servers and back again
as needed.
The most common cloud computing services can be described as Infrastructure as a Service
(IaaS), which is a utility computing model that provides customers with on-demand virtual servers
and storage. Applications in the cloud are generally available through a standard web browser,
and cloud computing is priced on a usage-based subscription service.
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