![]() ![]() Customers only pay for the central processing unit cycles, storage or bandwidth they consume. Public cloud services are sold on demand, typically by the minute or hour, though long-term commitments are available for many services. In the public cloud model, a third-party cloud service provider ( CSP) delivers the cloud service over the internet. Common private cloud technologies and vendors include VMware and OpenStack. Internal users might or might not be billed for services through IT chargeback. This model offers the versatility and convenience of the cloud, while preserving the management, control and security common to local data centers. With a private cloud, an organization builds and maintains its own underlying cloud infrastructure. Private cloud services are delivered from a business's data center to internal users. One common example of a SaaS application is Microsoft 365 for productivity and email services. In the SaaS model, users gain access to application software and databases. Users can access SaaS applications and services from any location using a computer or mobile device that has internet access. SaaS is a distribution model that delivers software applications over the internet these applications are often called web services. ![]() Common PaaS products include Salesforce's Lightning Platform, AWS Elastic Beanstalk and Google App Engine. PaaS is used for general software development, and many PaaS providers host the software after it's developed. Users access these tools over the internet using APIs, web portals or gateway software. In the PaaS model, cloud providers host development tools on their infrastructures. The IaaS cloud model is closest to a remote data center for business users. IaaS providers offer small, medium, large, extra-large, and memory- or compute-optimized instances, in addition to enabling customization of instances, for various workload needs. Users have an allocated storage capacity and can start, stop, access and configure the VM and storage as desired. IaaS providers, such as Amazon Web Services ( AWS), supply a virtual server instance and storage, as well as application programming interfaces ( APIs) that let users migrate workloads to a virtual machine ( VM). What are the different types of cloud computing services?Ĭloud computing can be separated into three general service delivery categories or forms of cloud computing: Automation and accompanying orchestration capabilities provide users with a high degree of self-service to provision resources, connect services and deploy workloads without direct intervention from the cloud provider's IT staff. Virtualization enables the easy abstraction and provisioning of services and underlying cloud systems into logical entities that users can request and utilize. Typically, there is a dedicated server for each individual application or workload.Ĭloud computing relies heavily on virtualization and automation technologies. The central server uses both software and middleware to manage connectivity between different client devices and cloud servers. The central server relies on protocols to facilitate the exchange of data. ![]() The back end functions as a repository, storing data that is accessed by the front end.Ĭommunications between the front and back ends are managed by a central server. The name cloud computing was inspired by the cloud symbol that's often used to represent the internet in flowcharts and diagrams.Īn internet network connection links the front end, which includes the accessing client device, browser, network and cloud software applications, with the back end, which consists of databases, servers and computers. ![]() Cloud computing can also be thought of as utility computing or on-demand computing. Private or public, the goal of cloud computing is to provide easy, scalable access to computing resources and IT services.Ĭloud infrastructure involves the hardware and software components required for proper implementation of a cloud computing model. A private cloud is a proprietary network or a data center that supplies hosted services to a limited number of people, with certain access and permissions settings. A public cloud sells services to anyone on the internet. These services are divided into three main categories or types of cloud computing: infrastructure as a service ( IaaS), platform as a service ( PaaS) and software as a service ( SaaS).Ī cloud can be private or public. Bigelow, Senior Technology EditorĬloud computing is a general term for anything that involves delivering hosted services over the internet. ![]()
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