How many types of resources used in cloud computing?
Answers
Answer:
Explanation:
1. Infrastructure as a Service (IaaS)
IaaS is the lowest level of cloud solution and refers to cloud-based computing infrastructure as a fully-outsourced service. An IaaS provider will deliver pre-installed and configured hardware or software through a virtualized interface. What the customers accessing the cloud services do with the service is up to them. Examples of IaaS offerings are managed hosting and development environments.
Your web hosting company is an IaaS provider. Some of the major players offering infrastructure as a service solution include Google, IBM, Rackspace Cloud Servers, Amazon EC2 and Verizon.
2. Platform as a Service (PaaS)
This type of cloud computing is similar to IaaS but is more advanced. With PaaS, apart from simply providing infrastructure, providers also offer a computing platform and solution stack as a service.The IT infrastructure may come with a graphic user interface, run-time system libraries, programming languages or an operating system.
PaaS services are mostly used by companies that need to develop, test, collaborate and deploy cloud solutions for particular applications. However, the hosting of the application is done by a third party i.e. the PaaS provider.
PaaS providers offer a fully configured sandbox and deployment environment for customers to develop, test and deploy their cloud applications. Examples of PaaS solutions include Salesforce.com’s Force.com, Rackspace Cloud Sites, Google App Engine and Microsoft Azure.
3. Software as a Service (SaaS)
When talking about cloud services, most people think of Software as a Service (SaaS) providers. SaaS providers provide fully functionally web-based applications on demand to customers. The applications are mainly targeted at business users and can include web conferencing, ERP, CRM, email, time management, project tracking among others.
The payment models for SaaS solutions can include subscription based (Salesforce), pay-for-use (WebEx) or free. More examples of companies that offer SaaS solutions include Citrix, NetSuite, and others.