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[http://communication.howstuffworks.com/cloud-computing.htm Cloud Computing]
Characteristics of Cloud Computing
1) Agility - improves with users' ability to rapidly and inexpensively re-provision technological infrastructure resources
2) Cost - is claimed to be greatly reduced and capital expenditure is converted to operational expenditure.
3) Device - enable users to access systems using a web browser regardless of their location or what device they are using.
4) Multi-tenancy - enables sharing of resources and costs across a large pool of users.
5) Reliability - improves through the use of multiple redundant sites, which makes cloud computing suitable
for business continuity and disaster recovery.
6) Scalability - via dynamic ("on-demand") provisioning of resources on a fine-grained, self-service basis near real-time.
7) Security - could improve due to centralization of data[38], increased security-focused resources.
8) Sustainability - comes about through improved resource utilization, more efficient systems, and carbon neutrality.
9) Maintenenace - cloud computing applications are easier to maintain, since they don't have to be installed
on each user's computer.