What is Cloud Computing?
Cloud Computing is a general term used to describe a new class of network based computing that takes place over the Internet,
- basically a step an from Utility Computing
- a collection/group of integrate d and networked hardware, software and Intemet infrastructure (a led a platform).
- Using the Intemet for communication and transport provides ha rdware, software a nd networking services to clients
These platfoms hide the complexity and details of the underlying infrastructure from use s and applications by providing very s imple graphical interface or API (Applications Programming Interface).
Types of Cloud Computing?
- SOFTWARE AS A SERVICE (SAAS)
- PLATFORM AS A SERVICE (PAAS)
- INFRASTRUCT URE AS A SERVICE (IAAS)
Software as a Service (SaaS)
- SaaS or software as a service is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network (internet).
- Through internet this service is avai lable to users anywhere in the world.
Platfom as a Service (PaaS)
PaaS provides all of the facilities required to support the complete life cycle of building and delivering web applications and services entirely from the Internet.
- Typically applications must be developed with a particular platform in mind
- Multi tenat environments
- Highly scalable multi tier architecture
Infrastructure as a Service (laaS)
- In an laaS model, a cloud provider hosts the infrastructure components traditionally present in an on-premises data center, including servers, storage and networking hardware, as well as the virtualization or hypervisor layer.
- IaaS customers access resources and services through a wide area network (WAN), such as the intermet, and can use the cloud provider's services to install the remaining elements of an application stack.
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