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2. “Cloud Computing is a style of computing where massively scalable IT-
enabled capabilities are delivered ‘as a service’ to external customers
using Internet technologies “
Cloud computing is a marketing term for technologies that provide
computation, software, data access, and storage services .
The two advantages of this is
Ease-of-use
Cost-effectiveness
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3. Cloud Computing Models
Cloud computing offers a variety of ways for businesses to increase their IT capacity
or functionality without having to add infrastructure, personnel, and software.
Cloud Providers offer services that can be grouped into three categories
Software as a Service (SaaS): These are on-demand end-user software
applications like Google Apps, Salesforce.com’s CRM and business management
services etc.
Platform as a Service (Paas): The platform used to design, develop, build & test
applications are provided by the cloud infrastructure. Examples are Google’ s App
Engine and Force.com.
Infrastructure as a Service (Iaas): In this pay per use model, services like storage,
database management & compute capabilities are offered on demand. Some
common examples are Amazon, Go Grid, 3 Tera, etc.
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4. Benefits of Cloud Computing
Cloud computing is a comprehensive solution that delivers IT as a service.
Some benefits are here.
Access a huge range of applications.
Applications can be accessed from the computer in
anywhere.
Users can avoid expenditure on hardware and software.
Companies can share resources in one place.
With minimum cost.
Scalability via on-demand resources.
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5. Types of Cloud Computing
Cloud computing can be divided into three different models: public,
private and hybrid.
Public Cloud: Available publicly - any organization may subscribe.
Private Cloud : Services built according to cloud computing principles,
but accessible only within a private network .
Hybrid Clouds : It could be a combination of a private cloud inside
organization with one or more public cloud providers
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6. Cloud Computing Architectures
Cloud Computing Architecture is web based, internet or “cloud" based progression
and the use of computer technology.
Is Agile
Is decreases Cost
Is appliance and location freedom
Is engages Multi-tenancy
It can be further secure because of centralization of
Is Reliable Is very scalable data and backup recovery
Is sustainable
Is simpler to maintain
Is metered
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7. Five Characteristics of Cloud Computing
• On-demand self-service: Individuals can set themselves up without needing
anyone’s help.
• Ubiquitous network access: Available through standard Internet-enabled
devices.
• Location independent resource pooling: Processing and storage demands
are balanced across a common infrastructure with no particular resource
assigned to any individual user.
• Rapid elasticity: consumers can increase or decrease capacity at
will.
• Pay per use: consumers are charged fees based on their usage of
a combination of computing power, bandwidth use and/or
storage
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8. Cloud Computing Challenges
Cloud computing are rapidly gaining enterprise adoption, many IT
professionals remaining skeptical, issues like security and standards continue
to challenge this emerging technology.
Some common challenges are:
 Data Protection
 Data Recovery and Availability
 Management Capabilities
 Regulatory and Compliance Restrictions
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9. Cloud Computing Risks
Internet outage may degrade the quality of service for end users.
The physical security of the data center may be compromised,
causing a loss of service or data.
Privacy may be compromised or applications may be misused if
data is accessed by unauthorized users.
Software employed to manage data center resources can
malfunction, causing interruption in services.
A SaaS provider may go out of business, leaving customers
without access to their data or critical software applications.
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