On-Demand Computing

on-demand computing On-demand (OD) computing is an increasingly popular enterprise model in which computing resources are made available to the user as needed. The resources may be maintained within the user's enterprise, or made available by a service provider. The on-demand model was developed to overcome the common challenge to an enterprise of being able to meet fluctuating demands efficiently. Because an enterprise's demand on computing resources can vary drastically from one time t...
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Infrastructure as a Service (IaaS) Definition

Infrastructure as a Service (IaaS) Definition Infrastructure as a service (IaaS) is a form of cloud computing that provides virtualized computing resources over the internet. IaaS is one of the three main categories of cloud computing services, alongside software as a service (SaaS) and platform as a service (PaaS). IaaS architecture and how it works In an IaaS model, a cloud provider hosts the infrastructure components traditionally present in an on-premises data center, includin...
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Software as a Service (SaaS) Definition

Software as a Service (SaaS) Definition Software as a service (SaaS) is a software distribution model in which a third-party provider hosts applications and makes them available to customers over the Internet. SaaS is one of three main categories of cloud computing, alongside infrastructure as a service (IaaS) and platform as a service (PaaS). SaaS removes the need for organizations to install and run applications on their own computers or in their own data centers. This eliminates the e...
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