Cloud Computing Definition

Editor's Notes

• #4: Programming language innovator and computing pioneer John McCarthy introduced a model of shared, virtualized resources that he called “utility computing” in a 1961 presentation. In early 2008, Nasa’s OpenNebula In the 1990s, telecommunications companies, who previously offered primarily dedicated point-to-point data circuits, began offering Virtual Private Network (VPN) services with comparable quality of service, but at a lower cost. By switching traffic as they saw fit to balance server use, While the concepts of cloud computing are not new, what is new, however, is that faster data communications capability, faster and more reliable computing power, denser and cheaper storage, and new programming paradigms have enabled comprehensive computational resource-sharing 
• #5: Application & Services that run on Distributed network using virtualized resource & Accessed by common Internet protocol & networking standards It is distinguished by the notion that resources are virtual and limitless and that details of the physical systems on which software runs are abstracted from the user.  Cloud computing is where an application doesn't access resources it requires directly, rather it accesses them through something like a service. So instead of talking to a specific hard drive for storage, and a specific CPU for computation, etc. it talks to some service that provides these resources. The service then maps any requests for resources to its physical resources, in order to provide for the application. Usually the service has access to a large amount of physical resources, and can dynamically allocate them as they are needed.
• #6: Cloud computing abstracts the details of system implementation from users and developers. Applications run on physical systems that aren't specified, data is stored in locations that are unknown, administration of systems is outsourced to others, and access by users is ubiquitous. Cloud computing virtualizes systems by pooling and sharing resources. Systems and storage can be provisioned as needed from a centralized infrastructure, costs are assessed on a metered basis, multi-tenancy is enabled, and resources are scalable with agility
• #7: Internet is a network of networks, which provides software/hardware infrastructure to establish and maintain connectivity of the computers around the word, while Cloud computing is a new technology that delivers many types of resources over the Internet. Therefore Cloud computing could be identified as a technology that uses the Internet as the communication medium to deliver its services. Cloud services can be offered within enterprises through LANs but in reality, Cloud computing cannot operate globally without the Internet.
• #8: Jeriko forum main focus is how to protect cloud networks.  • Physical location of the data: Internal (I) / External (E) determines your organization's boundaries. • Ownership: Proprietary (P) / Open (O) is a measure of not only the technology ownership, but of interoperability, ease of data transfer, and degree of vendor application lock-in. • Security boundary: Perimeterised (Per) / De-perimiterised (D-p) is a measure of whether the operation is inside or outside the security boundary or network firewall. • Sourcing: Insourced or Outsourced means whether the service is provided by the customer or the service provider. De-perimeterisation : In information security , de-perimeterisation is the removal of a boundary between an organisation and the outside world.
• #9: Deployment models: This refers to the location and management of the cloud's infrastructure. Service models: This consists of the particular types of services that you can access on a cloud computing platform.
• #10: Deployment models: This refers to the location and management of the cloud's infrastructure. “Public” does not mean “free”. Public cloud providers may offer some services free-of-charge, but in general they charge enough on average to at least cover their costs. Also, “public” does not mean that user data is visible to the public at large. Cloud providers implement security mechanisms to control access to data. Other Deployment Models Additional variations of the four base cloud deployment models can exist. Examples include: Virtual Private Cloud - Also known as a "dedicated cloud" or "hosted cloud," this model results in a self-contained cloud environment hosted and managed by a public cloud provider, and made available to a cloud consumer. Inter-Cloud - This model is based on an architecture comprised of two or more inter-connected clouds.
• #11: Cloud hosting deployment models represent the exact category of cloud environment and are mainly distinguished by the proprietorship, size and access. type of service that the service provider is offering 
• #13: ‘On-Demand, Self-Service’ implies a customer can order service via the web or some other method at any point in time, 24×7, which becomes immediately available for his or her use. ‘Broad network access’ implies widespread, heterogeneous network accessibility for thin, thick, mobile and other commonly used compute mediums. ‘Shared resource pooling’ connotes the aggregation of physical compute resources into a logical ‘pool’ that is dynamically allocated in a multi-tenancy capacity across broad application service requirements. ‘Rapid, bi-directional elasticity’ simply means additional capacity remains available and accessible on an ‘as needed’ basis, and is recovered back to the pool when no longer needed for alternative allocation. ‘Metered service’ as noted above means that all variables of resource consumption are tracked in capacity that users can be automatically billed for their consumption
• #15: VoIP is one of the services that is heavily deployed on cloud computing systems.