Cloud computing involves delivering computing services over the Internet. It relies on sharing resources rather than having local servers. There are different types of cloud services including Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). SaaS provides access to application software in the cloud. PaaS delivers computing platforms for developing applications. IaaS offers physical or virtual machines and other resources that can be rented.

1. CLOUD COMPUTING

2. HISTORY
• Cloud computing is a natural evolution of the
widespread adoption of virtualization , service-oriented
architecture and utility computing.
• The actual term “cloud” borrows from telephony
in that telecommunication companies who until
1990s offered primarily dedicated point-to-point
data circuits started offering Virtual Private
Network services with comparable quality of
service.

3. What Is Cloud
Computing??
• It is nothing but delivering
computing service over the
internet.
• In other words cloud
computing is nothing but it is
a computing that relies on
sharing computing resources
rather than having local
servers.
• Cloud is a metaphor for “The
Internet .” So a cloud
computing means a type of
internet based computing.

4. Why Cloud Computing?
• Cloud computing
enables companies and
applications which are
system infrastructure
dependent to be
infrastructure-less.
• It is user centric.
• It can be accessed.
• It is easily
programmable.

5. Cloud Architecture

6. • Individual users connect to cloud from their
own personal computers or portable devices
over the internet.
• To these individual users cloud is seen as a
single application , device or document.
• Cloud Architecture includes cloud service ,
cloud platform , cloud infrastructure and cloud
storage.

7. CLOUD STORAGE
• It means “storage of data online in the cloud , ”
where in a company’s data is stored and is
accessible from multiple distributed and
connected resources that comprise a cloud.
• They provide benefits of greater accessibility ,
reliability , rapid deployment.
• They have strong protection for data backup and
recovery purposes.
• However cloud storage has potential for security
and compliance concerns.

9. TYPES OF CLOUD STORAGE
• Public Cloud
• Private Cloud
• Hybrid Cloud

10. PUBLIC CLOUD
• A form of cloud storage where the enterprise
and storage service provider are separate and
data is stored outside of enterprises data
center.
• They free small businesses and enterprises
from expensive costs of having to purchase,
manage and maintain on premises storage
hardware and software resources.
• Example is Amazon.

11. PRIVATE CLOUD
• It also offers same benefits as of public cloud
systems but removes a number of objections
to cloud computing model including control
over enterprise and customer data.
• It is also very secure.
• Example are HP data centers

12. HYBRID CLOUD
• It is a combination of both private and public
cloud systems where some secure or important
data resides in enterprise’s private cloud while
other data can be accessible from public storage
provider.
• These systems combines the advantages of
scalability , reliability , rapid deployment and cost
savings of public cloud storage with security.
• Examples are sales and emails in public.

14. CLOUD SERVICE STACKS
• Software as a
Service(SaaS)
• Platform as a
Service(PaaS)
• Infrastructure as a
service(IaaS)

15. SaaS
• In this model , cloud providers install and operate
application software in the cloud and cloud users
access software from the cloud clients.
• Users do not manage cloud infrastructure and
platform where application runs which simplifies
maintenance as there is no need to install and
run application on own desktops.
• Examples are Google apps , Microsoft office 365.

16. Pros and Cons
Pros
• Free or can be paid through
subscription.
• Accessible from any
computer.
Cons
• Generating apllications not
suitable for business
purpose.

17. PaaS
• In this model , cloud providers deliver a
computing platform including OS , data base
and webserver.
• Application developers can develop and run
software solutions on platform without cost
and complexity of managing software and
hardware layers.
• Examples are Google app engine and windows
azure cloud services.

18. Pros and Cons
Pros
• Private or Public
deployment.
• Low cost and rapid
development.
Cons
• Limits developers to
provider languages and
tools.

19. IaaS
• In this model , providers offer computers
physical or virtual machines and other
resources.
• They offer capacity for rent , basically hosted
data centers and servers.
• An evolution of website and server hosting
services provided by VPS.
• Examples are Google compute engine , HP
cloud , Azure services platform.

20. Pros and Cons
Pros
• Capability to transfer work
to cloud during periods of
peak demand for on
premise systems.
Cons
• This model depends on
service provider.

21. Cloud Computing Providers

22. Pros of Cloud Computing
• Lower hardware and software maintenance
• Improved performance
• Increased data reliability
• Improved document format compatibility
• Instant software updates
• Portability
• Cost reduction
• Unlimited storage capacity

23. Cons of Cloud Computing
• Requires a constant internet connection
• Features might be limited
• Stored data may be lost
• It can be slow
• Bandwidth could bust budget

24. CONCLUSION
• Cloud computing provides a super computing
power.
• Cloud services are simpler to acquire
• They have tremendous benefits to customers
of all sizes
• This cloud of computers can extend beyond a
single company or enterprise.
• It is the fast growing part of IT

26. BOTTOM LINE