SaaS, PaaS and IaaS explained

We just had a fun challenge around cloud computing in our department, which involved researching some useful documentation around the cloud.

In that documentation was this neat description of the cloud together with explanation of the benefits:

Software as a Service (SaaS) allows businesses to provide direct access to the applications consumers, clients and citizens need from the Internet or company intranet.  Because the applications are centrally managed, there are no licenses or upgrades to maintain.     

Platform as a Service (PaaS) is an application development platform delivered on demand, allowing developers to focus on software design, development and deployment — without the cost and complexity of buying and managing the underlying hardware, software, provisioning and hosting. 

Infrastructure as a Service (IaaS) delivers compute power, storage and networking on demand, eliminating the high cost of maintaining, staffing and providing power and cooling for an in-house data center if the service is provided externally.  If it’s provided internally at a department level it still offers greatly improved speed and efficiency in providing compute resources needed for the business.          

Useful, huh?

Scrabbling around on YouTube I found this great video too:

There you go. Up to speed on cloud now?

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