cloud computing is used as the metaphor for "internet".It is the delivery of on demand access to computer resources such as servers, storage and applications.

2. What is Cloud Computing?
Cloud Computing is a new class of network based
computing that takes place over the Internet
 Users move data and applications to the remote
called “Cloud”
Access the data from the cloud in a simple and
pervasive way.
The platform provides on demand services that are
always on anywhere, anytime and any place.
2

3. According to Wikipedia:
"Cloud computing is Internet-based computing,
whereby shared resource, software, and information
are provided to computers and other devices on
demand, like the electricity grid.“

4. 4

5. Cloud Computing
Benefits
Cloud Computing
Benefits
Location
Independent
Secure &
Storage
Management
Secure Storage
Management
High Level
Computing
Utility Based
Time sharing
Model Pay-as- u-See
Scalability &
Sustainability
24/7Support
Virtualized &
Dynamic
Cloud Computing Benefits

6. Cloud Computing Models
6
Deployment
Model
Service Model
Models

7. Private
Cloud
Community
Cloud
Hybrid
Cloud
Public
Cloud
Deployment
Model

8. Software as a
Service(SaaS)
Infrastructure
as a
Servive(IaaS)
Platform as a
Service(PaaS)
Service Model

9. Cloud Service Models
9
Software as a
Service (SaaS)
Platform as a
Service (PaaS)
Infrastructure as a
Service (IaaS)
Google
App
Engine
SalesForce CRM
LotusLive
Adopted from: Effectively and Securely Using the Cloud Computing Paradigm by peter Mell, Tim Grance

10. Software as a Service (SaaS)
Software or an application is hosted as a service and
provided to customers across the Internet.
It eliminates the need to install and run the
application on the customer’s local computers.
It is run by cloud service provider and mostly used by
organizations.
It is available to users through internet.
10

11. Software as a Service(SaaS) Examples

12. Platform as a Service (PaaS)
PaaS is a platform where software can be
developed and tested without installing any
software on the system.
It means the entire life cycle of software can
be operated on a PaaS.

13. Platform as a Service(PaaS) Examples

14. Infrastructure as a Service (IaaS)
 It is operated, maintained and control by cloud
service providers.
It support various operations like storage,
hardware, servers and networking.

15. Infrastructure as a Service (IaaS)
Examples

16. Cloud Deployment Models
Private Cloud
Computing
Public Cloud
Computing
Hybrid
Cloud
Computing
Community
Cloud
Computing
Used for single
organization. It can be
hosted internally or
externally
Composition of two or
more clouds are bound
together and is
internally or
externally hosted.
Provisioned for open
use of public by a
particular organization
who host the service.
Shared by several
organization,
typically externally
hosted but may be
internally hosted by
one of the
organization

17. Security
CostingModel Data
Protection
Lack ofStandards
Compliance
Concern
Privacy
Factors and Challenges
Recovery

18. Factors and Challenges
It means confidentiality of information.
Protection of personal information. Every
individual has the right to control data, whether
private, public or professional.
Computing resources has introduced new
security challenges that require techniques to
tackle with.

19. Factors and Challenges
Data Security is a crucial element that warrants
scrutiny. There is fear of losing data and the
confidentiality of data. The actual storage
location is not disclosed, adding onto the security
concerns of enterprises.
The cost of transferring data to and from the public
and community Cloud and the cost of computing
resource is higher. This problem is prominent where
data is distributed amongst a number of
public/private/community clouds.

20. Factors and Challenges
Clouds have documented interfaces and
however, no standards are associated with
these.
Data Replication System monitoring,
Maintenance ,Disaster recovery Capacity and
performance management is under-served by a
cloud provider.

21. Some Commercial Cloud Offerings

22. Security Issues of Cloud Computing
Difficultto
m
igrate
Downtim
e&
Servicelevel
Incom
pleteData
Deletion
Internet
Dependency

23. • Difficult to migrate
It’s not very easy to move the applications from an enterprise to
cloud computing environment or even within different cloud
computing platforms.
• Internet dependency
Cloud computing services relies fully on the availability, speed,
quality and performance of internet .
Security Issues of Cloud Computing

24. • Downtime and service level
Every minute of downtime is minute in which business application
can’t be performed which degrades the performance of
organization.
• Incomplete Data Deletion
Incomplete data deletion is too much risky in cloud
computing.
Security Issues of Cloud Computing

25. 25
Advantages of
Cloud Computing
Improve
performance
Reduced
Software
Cost Format
compatibility
Unlimited
Storage
Instant
software
updates
Lower
computer
cost
Data
Independence

26. Advantages of Cloud Computing
Improved performance
Computers in a cloud computing run faster as they have
fewer programs and processes loaded into memory.
Unlimited storage capacity
Cloud computing offers virtually limitless storage.
Computer's current 1 TBytes hard drive is small compared
to the hundreds of PBytes available in the cloud.
26

27. Advantages of Cloud Computing
Lower computer costs
 No need of high-powered and high-priced computer to run
cloud computing.
Do not need a CD or DVD drive, as no software programs
have to be loaded.
Device independence
One is no longer tethered to a single computer or network.
Changes to computers, applications and documents follow one
through the cloud.
27

28. Advantages of Cloud Computing
Instant software updates
When the application is web-based, updates happen
automatically
Improved document format compatibility
No format incompatibilities in the cloud.
Latest version availability
The cloud always hosts the latest version of your
documents.
28

29. Advantages of Cloud Computing
Increased data reliability
 Computer crashing in the cloud does not affect the storage
of data.
 Cloud computing is a data-safe computing platform.
Universal document access
 Documents are instantly available .
 One can access documents whenever there is a computer
and an Internet connection.
Reduced software costs
 Softwares are available free of cost such as Google Docs
suite.
29

30. Disadvantages of
Cloud Computing
Can be
slow
Features
might be
limited
Do not work
well with
low speed
connections
Store data
can be
lost

31. Disadvantages of Cloud Computing
Requires a constant Internet connection
Cloud computing is impossible if there is no Internet
connection.
Stored data can be lost
Data stored in the cloud is safe.
If data goes missing there is no physical or local backup.
31

32. Disadvantages of Cloud Computing
Does not work well with low-speed connections
Web-based applications require a lot of bandwidth to download.
Low-speed Internet connection makes cloud computing painful
and often impossible.
Features might be limited
(Microsoft PowerPoint provides more features then Google Presentation's web-
based offering.)
Can be slow
Program has to be sent back and forth from our computer to the
computers in the cloud.
32