What is cloud?
Computing as a service over the Internet
Cloud computing is the delivery of on-demand computing resources—everything from applications to data centres—over the Internet on a pay-for-use basis.
Types Of Cloud Computing Services:
- Software As A Service
- Platform As A Service
- Infrastructure As A Service
Software As A Service(SaaS):
Cloud-based applications—or software as a service (SaaS)—run on distant computers “in the cloud” that are owned and operated by others and that connect to users’ computers via the Internet and, usually, a web browser.
Platform As A Service(PaaS):
Platform as a service provides a cloud-based environment with everything required to support the complete life cycle of building and delivering web-based (cloud) applications—without the cost and complexity of buying and managing the underlying hardware, software, provisioning and hosting.
Infrastructure As A Service(IaaS):
Infrastructure as a service provides companies with computing resources including servers, networking, storage, and data centre space on a pay-per-use basis.
Types Of Cloud:
- Public Cloud
- Private Cloud
- Hybrid Cloud
Public Cloud:
Public clouds are owned and operated by companies that use them to offer rapid access to affordable computing resources to other organisations or individuals. With public cloud services, users don’t need to purchase hardware, software or supporting infrastructure, which is owned and managed by providers.
Private Cloud:
A private cloud is owned and operated by a single company that controls the way virtualised resources and automated services are customised and used by various lines of business and constituent groups. Private clouds exist to take advantage of many of cloud’s efficiencies, while providing more control of resources and steering clear of multi-tenancy.
Hybrid Cloud:
A hybrid cloud uses a private cloud foundation combined with the strategic use of public cloud services. The reality is a private cloud can’t exist in isolation from the rest of a company’s IT resources and the public cloud. Most companies with private clouds will evolve to manage workloads across data centres, private clouds and public clouds—thereby creating hybrid clouds.
References:
