Cloud computing is the on-demand delivery of IT resources over the internet with a pay-as-you-go model, eliminating the need for large upfront hardware investments. It evolved from the 1950s and gained public traction with Amazon Web Services in 2006. Key service models include SaaS, IaaS, and PaaS, offering scalable and customizable solutions while providing advantages like reduced complexity and better reliability.

1. Introduction to Cloud Computing

2. Introduction
• "Cloud Computing", by definition, refers to the on-demand
delivery of IT resources and applications via the Internet
with pay-as-you-go pricing.
• With cloud computing, you don’t need to make large upfront
investments in hardware and spend a lot of time on the
heavy lifting of managing that hardware
• You can provision exactly the right type and size of
computing resources you need to power your newest bright
idea or operate your IT department.
• Pay as you need

3. Example
Yahoo, Gmail, Hotmail :-
Instead of running an e-mail program on your
computer, you log in to a Web e-mail account
remotely. The software and storage for your account
doesn't exist on your computer -- it's on the service's
computer cloud.

4. History
• Concept evolved in 1950(IBM) called RJE (Remote Job
Entry Process).
• In 2006 Amazon provided First public cloud AWS(Amazon
Web Service).

5. How Does it Work?
• Cloud Computing provides a simple way to access servers,
storage, databases and a broad set of application services
over the Internet.
• Cloud Computing providers such as Amazon Web Services
own and maintain the network-connected hardware required
for these application services, while you provision and use
what you need via a web application.

6. Advantages
• Reduce the complexity of networks.
• Do not have to buy software licenses.
• Customization.
• Cloud providers that have specialized in a
particular area (such as e-mail) can bring
advanced services that a single company
might not be able to afford or develop.
• scalability, reliability, and efficiency.
• Info. at cloud are not easily lost.

9. Service Models
• SaaS – Software as a Service
• IaaS – Infrastructure as a Service
• PaaS – Platform as a Service
• DaaS – Desktop as a Service

10. Middleware: Like Apache Server
Runtime: Like Language Runtime
Data: Could be Database

11. What is ARPANET?

12. Service Models

13. Saas
• SaaS is a software delivery
methodology that provides licensed
multi-tenant access to software and
its functions remotely as a Web-
based service.
– Usually billed based on usage
– Usually multi tenant environment
– Highly scalable architecture

14. SaaS Examples

15. IaaS
• IaaS is the delivery of technology
infrastructure as an on demand
scalable service
– Usually billed based on usage
– Usually multi tenant virtualized
environment
– Can be coupled with Managed
Services for OS and application
support

16. IaaS Example

17. PaaS
• PaaS provides all of the facilities
required to support the complete life
cycle of building and delivering web
applications and services entirely
from the Internet.
– Typically applications must be
developed with a particular platform
in mind
– Multi tenant environments
– Highly scalable multi tier architecture

18. PaaS Example

19. Deployment Models
• Public cloud
• Private cloud
• Hybrid cloud
• Community cloud

20. Thank You