In this post we will compare and contrast 'infrastructure and
platform as a service' delivered from public cloud.
Infrastructure as a service delivers raw compute power in the
form of virtual machines. Organisations can go to an IaaS
provider and request a number of virtual machines, say a hundred
Windows servers and the provider will stand up these VM’s and
charge the organisation on compute time consumed by these. The
organisation can then install software and applications within
these VM’s and provide access to their users. So our
architecture model looks something like the diagram below. The
Datacentre, the network, compute platform and storage are all
managed by the service provider: Using IaaS the organisation
manages the virtual machines as well as the applications. This
includes the underlying operating system and any other
application components requires to make sure the application
runs effectively. Organisations can start and stop these Virtual
Machines providing scalability and elasticity. IaaS is