What are the requirements for implementing IaaS strategy in Cloud?

Main requirements to implement IAAS areas follows:

I. Operating System(OS): We need anOS to support hypervisor in IaaS. Wecan use open source OS like Linux for this
purpose.
II. Networking :We haveto defineand implement networking topology for IaaS implementation. Wecan use public or private
network for this.
III. CloudModel :We haveto select therightcloud modelfor implementing IaaS strategy. Itcan be SaaS, PaaS or CaaS.