Ramesh Sigdel gave a presentation on cloud computing that covered its definition, essential characteristics, types of clouds, service models, advantages and disadvantages. According to NIST, cloud computing is a model that enables on-demand access to a shared pool of configurable computing resources. The presentation discussed the five essential characteristics of cloud computing - on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. It also covered the three main service models - SaaS, PaaS, and IaaS - and concluded that cloud computing increases ease of use and access to computing resources through the internet.

1. Presentation On
03/14/141
Prepared By
Ramesh Sigdel
MCIS Third Semester
Roll No:-12818

2. Presentation Covered
 What Is cloud computing?
 Essential Characteristics (According to NIST)
 How the Cloud is useful?
 Do you Use the Cloud?
 Types of Cloud
 Service models
 Advantages/Disadvantages
 Security
 Conclusion
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3. What Is cloud computing?
 The term “Cloud Computing” is being over
used in last some years
 Some defines narrowly as virtual services
available over the internet, some go very
broad, arguing anything you consume outside
the firewall is in cloud (including conventional
outsourcing)
 This distinction among experts indicates that it
is still somewhat of an evolving concepts
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4. What Is cloud computing? Contd…
 “Cloud” is used as a metaphor for “the internet”
so cloud computing means a type of internet
based computing
 NIST 2011
– “Cloud Computing is a model for enabling ubiquitous
(ever present), convenient, on-demand network
access to a shared pool of configurable computing
resources(e.g. networks, servers, storages,
applications) that can be rapidly provisioned and
released with minimal management effort of service
provider interaction.” 03/14/14By:- Ramesh Sigdel
4

5. What Is cloud computing? Contd…
 With this reference we can say
– Cloud computing have the ability to be everywhere
at once
– Multiple people can have access to various
computing resources as their requirements from any
geographic distance.
– According to NIST the cloud computing model is
composed of five essential characteristics.
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6. 03/14/14By:- Ramesh Sigdel6

7. Essential Characteristics
 On-demand self service
– It is a prime feature of most cloud providers
– A consumer can provision computing capabilities
such as server time and network storage as needed
– the user accesses cloud services through an online
control panel.
– user can scale the required infrastructure up to a
substantial level without disrupting the host
operations.
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8. Essential Characteristics
 Broad Network access
– Resources are available in N/w
– Can be accessed through standard mechanism and
promote heterogeneous platforms(mobile, tablets,
laptops and workstations)
– broad network access may not be deployed by
many companies in a purely private cloud model.
– is becoming more common in hybrid cloud settings.
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9. Essential Characteristics (Contd…)
 Resource pooling
– Service provider’s resources are pooled to serve
multiple consumers
– Resources can be assigned and reassigned to the
consumers as they demanded
– users are not aware of the physical servers
providing the resources.
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10. Essential Characteristics (Contd…)
 Rapid elasticity
– Resources capabilities can be elastically
provisioned and released
– Edwin Schouten defines
 Elasticity is basically a ’Rename’ of ‘scalability’ and
removes any manual labor needed to increase or reduce
capacity.
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11. Essential Characteristics (Contd…)
 Measured Services
– Resources usage can be monitored, controlled, and
reported by both user and administrator
– users are able to see their own cloud usage
– administrators can see the entire cloud usage
– Generally done on pay-per-use or charge-per-use
basis
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12. How the Cloud is useful?
 Traditional computer setup requires you to be
in the same location as your data storage
 Cloud makes possible to access your
information from anywhere at any time
 Especially helpful for business that cannot
afford the H/w and storage space
 You only need to pay for resources you will use
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13. Do you Use the Cloud?
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14. Do you use the cloud (Contd…)
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15. Types of Clouds
 Public Cloud
– Computing infrastructure is hosted by cloud vendor
at the vendors premises, and can be shared by
various organizations.
– Ultimate scalability
– Cost effective
– Utility style costing; public cloud services often
employ a pay-as-you-go charging model
 Avoid wasted capacity
– Reliability; number of servers and networks involved
– E.g. : Amazon, Google, Microsoft, Sales force
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16. Types of Clouds (Contd…)
 Private Cloud
– The computing infrastructure is dedicated to a
particular organization and not shared with other
organizations,
– only the specified client can operate
– more expensive and more secure when compare to
public cloud.
– greater control and privacy.
– Cost and energy efficiency in comparison to
traditional LANs
– E.g. : HP data center, IBM, Sun, Oracle, 3tera
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17. Types of Clouds (Contd…)
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Public Cloud Private Cloud
Multiple Clients
Hosted at providers Location
Shared Infrastructures
Access over Internet
Low-Cost
Single Clients
Hosted at providers/Orgs Location
Accessed over internet/Private N/w
High Security
High Cost

18. Types of Clouds (Contd…)
 Hybrid Cloud
– Organizations may host critical applications on
private clouds.
– where as relatively less security concerns on public
cloud.
– usage of both public and private together is called
hybrid cloud.
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19. Types of Clouds (Contd…)
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You Got Public
Cloud in my
Private Network
You Got Private
Cloud in my
Public Cloud

20. Service Models
 Each providers serves a specific function,
giving users more or less control depending on
type
 While choosing provider compare your needs
to cloud services available
 Cloud you require for personal use may vary
than the cloud you require for your business
 Cloud provider will be pay-as-you-go, you can
purchase more resources as they are needed.
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21. Service Models (Contd…)
Mostly there are three service models of cloud
 Software as a Service (SaaS)
 Platform as a Service (PaaS)
 Infrastructure as a Service (IaaS)
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22. Service Models (Contd…)
 Software as a Service-End User
– also known as On-demand Service.
– is an application that can be accessed from
anywhere on the world as long as you can have an
computer with an Internet Connection
– We can access this cloud hosted application without
any additional hardware or software.
– E.g. : G-mail, Yahoo mail, Hotmail etc.
– Also they can provide security features such as SSL
encryption, a cryptographic protocol.
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23. Service Models (Contd…)
 Platform as a Service-Application Developers
– Give us nice API (Application Programming Interface)
and take care of the implementation.
– In the PaaS model, cloud providers deliver a
computing platform and/or solution stack typically
including operating system, programming language
execution environment, database, and web server.
– is a platform for developers to develop their own
applications, which means rapid development at low
cost
– E.g. Salesforce.com, Windows Azure etc. 03/14/14By:- Ramesh Sigdel
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24. Service Models (Contd…)
 Infrastructure as a Service-Network Architect
– also known as hardware as a service.
– is a computing power that you can rent for a limited
period of time.
– allows existing applications to be run on a cloud
suppliers hardware.
– cloud providers offer computers – as physical or
more often as virtual machines – raw (block)
storage, firewalls, load balancers, and networks
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25. Service Models (Contd…)
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Cloud Clients
Web browsers, mobile app, thin client, terminal
emulator, …
SaaS
CRM, Email, virtual desktop, communication, games,
…
PaaS
Execution runtime, database, web server,
development tools, …
IaaS
Virtual machines, servers, storage, load balancers,
network, …

26. Advantages of Cloud Computing
 Instant, flexible, pay-per-use.
 No contracts, usage based, no upfront cost
 Rent based on used only
 Echo friendly
 We can reduce E-waste by using Cloud
Computing i.e. by Infrastructure as a Service
(IaaS).
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27. Advantages of Cloud Computing(Contd…)
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F a c e b o o k D a t e C e n t e r
G o o g l e S e r v e r

28. Disadvantages of Cloud Computing
 Cloud computing is impossible if you cannot
connect to the Internet.
 Since you use the Internet to connect to both
your applications and documents, if you do not
have an Internet connection you cannot access
anything, even your own documents
 When you are offline, cloud computing simply
does not work
 Security and Privacy
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29. Security
 Methods of encryption
 Will they have backup of data
 Do they have firewall setup
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30. Conclusions
 Cloud Computing is a model for enabling
ubiquitous, convenient, on-demand network
access to a shared pool of configurable
computing resources that can be rapidly
provisioned and released with minimal
management effort of service provider
interaction.
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31. Conclusions (Contd…)
 It opens up the world of computing to the
broader range of usages and increases the
ease of use (through internet)
 You must be aware of the security risk of
having data stored on the cloud, it can be
accessed through an unsecured internet
connection
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32. 03/14/14By:- Ramesh Sigdel32
Any Question
Q & A

33. Do not forgot to
provide feedback
through Evaluation
Report.
Thank you so much for your
valuable time.
03/14/14 By:- Ramesh Sigdel33