Miscellaneous 25 Oct , 2016
Cloud computing is divided into three broad service categories: software-as-a-service (SaaS), platform-as-a-service (PaaS), and infrastructure-as-a-service (IaaS).
Software-as-a-service (SaaS)– is a way of delivering applications over the Internet. Customers can access SaaS applications right from a Web browser, which means there is no hardware or software to buy, install, maintain, or update. The SaaS provider takes care of everything – and the customer always has the latest version of the application.
The pioneer in this field has been Salesforce.coms offering in the online Customer Relationship Management (CRM) space. Other examples are online email providers like Googles gmail and Microsofts hotmail, Google docs and Microsofts online version of office called BPOS (Business Productivity Online Standard Suite).
Platform-as-a-service (PaaS) provides a cloud platform and tools to help developers build and deploy cloud applications. Users access PaaS from a Web browser, so there is no need to purchase and maintain the underlying hardware and software. With PaaS, developers can pick and choose the features they want on a subscription basis.
Infrastructure-as-a-service (IaaS) lets companies “rent” computing resources such as servers, networks, storage, and operating systems on a pay-per-use basis. IaaS providers host the infrastructure and handle tasks like system maintenance and backups – so customers don’t have to buy hardware or employ in-house experts to manage it.
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