[jmontgomery2]

A virtualized environment allows users to access simulated versions of computer technology and interacts with physical computing technology using a NIC. A cloud computing environment is a pool of resources that mulitple users can access at any given time.
Virtualized networks are laid over a companies existing infrastructure and is provided by the company themselves. A cloud computing environment is completely off site and is provided by the company that runs the cloud computing service.
Cloud computing environments are also virtual by nature but their main difference is that cloud computing services are on demand unlike virtual machines.