cloud computing by akshit3230


									   Cloud Computing

Computer Science & Technology
Cloud computing is an emerging computing technology that
uses that internet and central remote servers to maintain data
and applications
The underlying concept of cloud computing dates back to 1960, whenJohn
McCarthy opined that "computation may someday be organized as a public
utility"; indeed it shares characteristics with service bureausthat date back to
the 1960s.

The actual term "cloud" borrows from telephony in that telecommunications
companies, who until the 1990s primarily offered dedicated point-to-point data
circuits, began offering VIRTUAL PRIVATE NETWORK (VPN)´ services with
comparable quality of service but at a much lower cost.

The cloud symbol was used to denote the demarcation point betweenthat which
was the responsibility of the provider from that of the user.Cloud computing
extends this boundary to cover servers as well as thenetwork infrastructure.

Cost is claimed to be greatly reduced and capital expenditure isconverted to
operational expenditure. Device and locationindependence enable users to
access systems using a web browser regardless of their location or what device
they are using.

Helps to use applications without installations.

Access the personal files at any computer withinternet access.

This technology allows much more efficientcomputation by centralizing storage,
memory,processing and band width.
a cloud client consists of computer hardware and/or computer softwarethat
relies on cloud computing for application delivery
Cloud application services or "Software as a Service (SaaS) "

deliver software as a service over the Internet,eliminating the need to install
and run the application on the customer's own computers and simplifying
maintenance and support.

Cloud platform services or "Platform as a Service (PaaS)"

deliver a computing platform and/or solution stackas a service, often
cloud infrastructure and sustaining cloud applications.It facilitates deployment
of applications without the cost and complexity of buying and managing the
underlying hardware and software layers.
Cloud infrastructure services or " Infrastructure as a Service (IaaS) "

delivers computer infrastructure,typically aplatform virtualization environment,as
a service.Rather than purchasing servers,software,data center space or
network equipment, clients instead buy those resources as a fully outsourced
service.The service is typically billed on autilitycomputingbasis and amount of
resourcesconsumed (and therefore the cost) will typicallyreflect the level of
activity. It is an evolution of virtual private server offerings.

The servers layer consists of computer hardwareand/or computer software
products that arespecifically designed for the delivery of cloudservices,
including multi-core processors, cloud-specific operating systems and combined

A community cloud may be established where several organizations have
similar requirements and seek to share infrastructure so as to realize some of
the benefitsof cloud computing. With the costs spread over fewer users than
a public cloud,
this option is more expensive but mayoffer a higher level of privacy, security
and/or policycompliance.Examples of community cloud include Google's

A hybrid cloud environment consists of multiple internal and/or external
providers "will
be typical for most enterprises". By integrating multiple cloud services, users
may be
able to ease the transition to public cloud services.
Private cloud and Internal cloud are expressions that some vendors have
recently used to describe offerings that emulate cloud computing on private

The Cloud model has been criticized by privacy advocates for thegreater ease
in which the companies hosting the Cloud servicescontrol, and thus, can
monitor at will, lawfully or unlawfully, thecommunication and data stored
between the user and the host company.
Instances such as the secret NSA program, working with AT&T, and Verizon,
which recorded over 10 million phone calls between American citizens, causes
uncertainty among privacy advocates,and the greater powers it gives to
telecommunication companies to monitor user activity.
In March 2007,Dellapplied totrademark the term "cloud computing"(U.S.
Trademark 77,139,082) in theUnited States. The "Notice of Allowance" the
company received in July 2008 was cancelled inAugust, resulting in a formal
rejection of the trademark application lessthan a week later.

Since 2007, the number of trademark filings covering cloud computing brands,
goods and services has increased at an almost exponential rate.As companies
sought to better position themselves for cloud computing branding and
marketing efforts,cloud computing trademark filings increased by 483%
between 2008 and 2009.´In2009, 116 cloud computing trademarks were filed,
and trademark analysts predict that over 500 such marks could be filed
The relative security of cloud computing services is acontentious issue which
may be delaying its adoption. Someargue that customer data is more secure
when managedinternally, while others argue that cloud providers have astrong
incentive to maintain trust and as such employ ahigher level of security.

Cloud computing is a better way to run your business. Instead of running your
apps yourself,they run on a shared data center. When you use anyapp that
runs in the cloud, you just log in, customizeit, and start using it. That is the
power of cloud computing.

Finally, cloud apps don't eat up your valuable ITresources, so your CFO will
love it. This lets youfocus on deploying more apps, new projects, and
Thank You

            Adi Soni

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