Cloud Computing Essay

5822 Words Nov 13th, 2012 24 Pages
Cloud computing
Cloud computing is the use of computing resources (hardware and software) that are delivered as a service over a network (typically the Internet). The name comes from the use of a cloud-shaped symbol as an abstraction for the complex infrastructure it contains in system diagrams. Cloud computing entrusts remote services with a user's data, software and computation.
There are many types of public cloud computing:[1]
Infrastructure as a service (IaaS)
Platform as a service (PaaS)
Software as a service (SaaS)
Storage as a service (STaaS)
Security as a service (SECaaS)
Data as a service (DaaS)
Database as a service (DBaaS)
Test environment as a service (TEaaS)
Desktop virtualization
API as a service (APIaaS)
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Contents [hide]
1 History
2 Similar systems and concepts
3 Characteristics
3.1 On-demand self-service
4 Service models
4.1 Infrastructure as a service (IaaS)
4.2 Platform as a service (PaaS)
4.3 Software as a service (SaaS)
5 Cloud clients
6 Deployment models
6.1 Public cloud
6.2 Community cloud
6.3 Hybrid cloud
6.4 Private cloud
7 Architecture
7.1 The Intercloud
7.2 Cloud engineering
8 Issues
8.1 Privacy
8.2 Compliance
8.3 Legal
8.4 Open source
8.5 Open standards
8.6 Security
8.7 Sustainability
8.8 Abuse
8.9 IT governance
9 Research
10 See also
11 References
12 External links

This section requires expansion. (June 2012)
The origin of the term cloud computing is obscure, but it appears to derive from the practice of using drawings of stylized clouds to denote networks in diagrams of computing and communications systems. The word cloud is used as a metaphor for the Internet, based on the standardized use of a cloud-like shape to denote a network on telephony schematics and later to depict the Internet in computer

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