The document discusses cloud computing and provides an overview of its key concepts. It describes cloud computing as distributing computing as a service using hardware, networks, storage and interfaces. It then outlines the three main layers of cloud computing: Infrastructure as a Service (IaaS) which provides virtual servers and storage; Platform as a Service (PaaS) which provides development platforms; and Software as a Service (SaaS) which provides applications via the cloud. The presentation covers the benefits of cloud computing and differences between public and private clouds.

1. Cloud Computing
Presentation By RAVI NAMBOORI

2. Outline of the Talk
• Introduction to Cloud Computing
• Demonstration of Cloud capabilities
• Infrastructure as a Service
• Platform as a Service
• Software as a Service
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3. Introduction to Cloud Computing
A cloud is an amalgamation of hardware, networks, storage, services, and interfaces that helps in
distributing computing as a service. It has broadly three users which are end user, business management
user, and cloud service provider. The end user is the one who uses the services provided by the cloud. The
business management user in the cloud takes the responsibility of the data and the services provided by
the cloud. The cloud service provider is the one who takes care or is responsible for the maintenance of
the IT assets of the cloud. The cloud acts as a common centre for its users to fulfil their computing needs.
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4. Cloud computing is a method of accessing numerous servers by an electronic device with digital network
such as WAN or any internet connection. Cloud computing is the future of information technology. It
embodies all the big trends in the design and use of computer architectures. And it ties closely to other
trends such as big data and the "Internet of things."
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5. Benefits
There are numerous benefits of cloud computing including data backup and storage of data, powerful
server capabilities, software as a service known as (SaaS) etc.
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6. Private V/S Public Clouds
The Cloud, apart from its different layers, is also visible through three alternates. There are the public
Clouds for instance, a deployment option for initiatives where the infrastructure services are provided by
a hosting partner. It is this third party dealer that hosts and manages these offerings.
The other version is the private Cloud, where it is deployed within the initiatives and managed and
maintained by the organization itself. A private cloud is a collection of virtualized infrastructure textiles
that are coupled with automated management. It is deeply integrated with the application platform and
identity, protection and access technologies to create an internal service-oriented environment for
initiatives.
Although the private cloud does not offer advantages with the hypervisor capability becoming integral
to the operating system, it is becoming increasingly affordable for initiatives.
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7. A more recent, new concept in Cloud computing is the hybrid Cloud, which is a blend of the public and private
Cloud. The hybrid Cloud, created by the enterprise, can influence the benefits provided by both public and
private Clouds. However, issues related to the sharing of responsibilities between the enterprise and the third
party vendor and governing such a Cloud, make it a slightly complex deployment option.
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8. Cloud Computing Layers
To understand Cloud computing, we need to understand in details about the three layers of cloud
computing.They are:
• Infrastructure-as-a-Service (IaaS)
• Platform-as-a-Service (PaaS)
• Software-as-a-Service (SaaS) 8

9. Infrastructure as a Service
This layers is also called as Infrastructure service layer. In the instance of IaaS, servers, network devices,
and storage disks are made available to groups as services on a need-to basis.Virtualization, allows IaaS
providers to offer almost unlimited requests of servers to clients, while making cost-effective use of the
hosting hardware.
Companies can use IaaS to build new versions of without having to invest in physical IT assets.
Increasingly, organizations are using IaaS to host their websites, monitor their traffic and keep them
running, without monopolizing up IT resources. IaaS is particularly beneficial for micro, small and
medium-sized businesses that can access server and storage systems, which they would otherwise have
to purchase.
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10. Some of the key concepts of IaaS include:
• Cloud bursting
• Multi-tenant computing
• Resource pooling
• The hypervisor
Most importantly, the two primary facets that make IaaS special: elasticity and virtualization.
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11. Platform-as-a-Service
This layers is also called as Platform layer.This layer provides a platform for creating applications. PaaS
solutions are fundamentally developed platforms for which the development tool itself is hosted in the
Cloud and retrieved through a browser.With PaaS, developers can buildWeb applications without
installing any tools on their computers and then deploy those applications without any generalized
systems administration skills.
Today, PaaS is being delivered like a utility over the Internet, with corporate IT departments, paying
according to usage. Owing to PaaS, there has been a barrier in the number of people who can develop,
maintain and deploy web-based applications without requiring specialized skills.
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12. The defining factor that makes PaaS unique is that it lets developers build and deploy web applications
on a hosted infrastructure. In other words, PaaS allows you to leverage the seemingly infinite compute
resources of a cloud infrastructure.
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13. Software-as-a-Service
This layers is also called as Application layer. This layer includes applications that run off the Cloud and
are available to Web users on anytime and on anywhere basis. Explore the four primary factors that drive
return on investment for Software as a Service developers and how those factors are leveraged to make
SaaS profitable for stakeholders. In this final article of a three-part series, discover the business model
opportunities that SaaS presents and gain insight into the role of user experience design for SaaS
applications.
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