Cloud Computing Service Models

In this article, we will try to understand in simplest possible way; What is cloud? What are different cloud offerings? How does it work for you?

Cloud computing constitutes a broad range of services. Web is the common thread between all of these. So something sitting on your desktop and able to operate on its own is not a cloud service.

Key characteristics of a cloud based solution are:

It is available on demand.

• It can be accessed through standard platforms like desktop, laptop, mobile.
• It can be used by multiple people.
• People can share resources.
• It can easily handle increase/decrease of user base.
• Solution can scale up/down easily.
• Billing for the service can be easily measured.

There are different types of cloud computing services commonly classified as Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). In a very simplistic explanation:

• SaaS – is software delivered over web.
• PaaS – is platform delivered over web, for the creation of the software.
• IaaS – is infrastructure (hardware/software) delivered over web as an on demand leased service.

Let’s take a deeper look at these services.

Software as a Service (SaaS)

Characteristics:

• It is available through web either as a paid/free service.
• It is centrally managed and delivered to all.
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