The document discusses cloud computing, providing an overview of its key features, history, service models, deployment models, advantages, and disadvantages. It notes that cloud computing allows for resource scalability, on-demand access, and pay-as-you-go pricing. Historically, the concept originated in the 1960s but failed due to network limitations, while current cloud computing grew out of grid computing and data center utilization in the 2000s. The main service models are infrastructure as a service, platform as a service, and software as a service, while the primary deployment models are public, private, community, and hybrid clouds. The advantages include ubiquitous access, no hardware ownership, and low costs, but disadvantages involve privacy, security,

1. Sayed Ahmed
BSc. Engineering in Computer Science and Eng. (BUET), Bangladesh
MSc., Computer Science, Canada
Owner
Justetc (Just et cetera) Technologies
http://www.justetc.net
http://sayed.justetc.net
sayed@justetc.net

2. Topics
 What is Cloud Computing?
 Features of Cloud Computing
 Do you use Cloud Computing?
 Why Cloud Computing?
 History of Cloud Computing
 Advantages of Cloud Computing
 Service Model of Cloud Computing
 Deployment model of Cloud Computing
 Disadvantages of Cloud Computing

3. Features of Cloud
Computing
 Resource Scalability
 On Demand
 Pay as You Go

4. History
 1960
 A city will have one or two mega computers; people will
rent and will have display units and keyboards at home
○ Failed mainly because network technology was not
advanced enough
 1990s
 Grid computing for scientists
 Bring all supercomputers into a grid
 2000s
 Dot com bust
 2005-2006: utilize the data centers
○ Rent servers
○ Use virtual machine

5. Service Model
 Infrastructure as a Service (IaaS)
 Platform as a Service (PaaS)
 Software as a Service (SaaS)

6. Deployment Model
 Public
 Community
 Private
 Hybrid

7. Advantages of Cloud
Computing
 Always online
 No need to own hardware
 Do not need to worry how information
are stored or processed
 Low cost

8. Disadvantages of Cloud Computing
 Privacy
 Security
 No control on your information
 No control on how and where your
information are processed

9. Thanks
Any Concerns?
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