
181Virtualization
is known as the Infrastructure as a Service (IaaS)model. The virtualiza-
tionconcept is fully utilized in the infrastructure layer of the cloud com-
puting. The IaaS service offers virtual memory, virtual processors, virtual
storage, and virtual networks to run the VMs.
The IaaS service utilizes the memory, processor, storage, and network vir-
tualizationof the underlying infrastructure. The IaaS layer uses the hyper-
visors to abstract the underlying resources for the VMs. The virtual data
center will not be simply referred to as a cloud data center. The virtualized
data center will be called as cloud data center if it delivers ...