
117Technological Drivers for Cloud Computing
Private DCs are interconnected through an enterprise-dedicated private
network or VPN. Public DCs are connected through the Internet, and they
offer multitenant Internet-based services. Virtual private DCs could be built
using a common DC infrastructure provided by an IaaS provider. The under-
lying network for a virtual private DC provides the tenant network isolation
and privacy features. Cloud services could be built by interconnecting DCs
and utilizing the collective set of resources in these DCs as a resource pool.
Virtualization technology is used to create a VM on a server with dedicated
CPU cy ...