Cloud Service Models: Comparing SaaS PaaS and IaaS

Defining what comprises Cloud Computing is hard because it is so many things. Many vendors do not help clarify it because labelling products as Cloud Computing makes them appear current and more relevant. Despite all the marketing hype, Cloud Computing can be readily broken down into one of three delivery models as defined by NIST […]
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Elastic IP in Amazon EC2

As part of the EC2 service Amazon offers a feature called “Elastic IP Addresses” (EIP). Exactly what are these and how can we use them to our advantage? The idea behind Elastic IPs (which really are static addresses) in AWS is that you can reserve an IP address.  Then you can assign that IP address […]
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Comparing PaaS and IaaS

One of the most common questions I am asked when consulting or teaching Learning Tree’s Cloud Computing course is “What is the difference between Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). This is an excellent question that the cloud computing vendors do little to help clarify. Let’s consider IaaS first… As […]
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