Cloud Computing is a general term used to describe a new class of network based computing that takes place over the Internet, a collection/group of integrated and networked hardware, software and Internet infrastructure. provides hardware, software and networking services to clients. These platforms (networked hardware) hide the complexity to provide a very simple service.

1. Cloud Computing
Fares Jemni
Ali Ben Messaoud

2. Plan
• Introduction
• What is Cloud Computing ?
• Cloud Computing Approaches
• Key Technology: Virtualization
• Conclusion

3. Introduction
• Cloud Computing is a new and exciting trend which many of
us, even in the information technology field are, let’s say, a
“little cloudy about”.
• What is cloud computing?
• Are there different levels or types of cloud computing?
• Who exactly are these cloud computing providers?

4. What is Cloud Computing?
• Cloud Computing is a general term used to describe a
new class of network based computing that takes
place over the Internet,
• a collection/group of integrated and networked hardware,
software and Internet infrastructure
• provides hardware, software and networking services to
clients
• These platforms (networked hardware) hide the
complexity to provide a very simple service

5. What is Cloud Computing?
• Anything outside of your system’s firewall and
includes a pay-per-use or subscription service that
extends your agencies information technology
through the internet as the primary access point.

7. Basic Cloud Characteristics
• “no-need-to-know”
• details of infrastructure, applications interface with the
infrastructure via the APIs.
• “flexibility and elasticity”
• scale up and down allocated resource
• “pay as much as used and needed”
• “always on!, anywhere and any place”

8. 3 Approaches to Cloud Computing
• Software as a service (SaaS) :
• access to software and its functions remotely through internet
browsers.
• Platform as a service (PaaS) :
• computing platform is being delivered as a service, eg. purchase
and manage hardware remotely.
• Infrastructure as a service (IaaS) :
• defined as computer infrastructure, such as virtualization, being
delivered as a service.
• billed on usage and how much of the resource is used in data
centers for example.

9. XaaS

11. Key Technology: Virtualization
• The ability to run multiple version of something, such as a
hardware platform, operating system, a storage device or
network resources on a single physical system and share the
underlying hardware resources.
• cloud computing is famous for scalability because of
virtualization.
• Without virtualization, cloud computing as we know it would
not exist or would be in a different form.

12. Virtualize for Efficiency, Higher
Availability, and Lower Costs
• Run multiple operating systems and applications on a single
computer
• Consolidate hardware to get vastly higher productivity from
fewer servers
• Save 50% or more on overall IT costs
• Speed and simplify IT management, maintenance, and the
deployment of new applications

13. Virtualization How it Works?

14. Virtualization+Cloud

15. Conclusion
• Cloud computing is the future.
• Cost
• Performance
• Data and Security
• Support
• Service Level Agreements