Why we need VMware(virtualization)
virtualization- Transforming the hardware into software.

benefits-
- To reduce the infrastructure cost.
- for effective utilization hardware information(hardware resources like RAM,hard disk)

virtualization Types-

1.Server virtualization
2. Network virtualization
3.Storage virtualization
4.Application virtualization
5.Desktop virtualization
virtualization  providing software companies.
company        product

VMWARE    (vsphere)  (leading in the industry)
Oracle            (virtual box)
Microsoft     (Hyper -virtualization)
Citrix             (Xen-Application,xen server)
Redhat           (KVM)
and many other companies also available but above are the best.
VMWARE main concepts:-
Virtual  Machine
Vcenter
ESX/ESXi
Virtual Storage
High availability and  DRS
Deploy,manage  and patching.
Update manager
ISCSI, FC, NFS,
Snapshots
Migrations - v Motion and s Motion