What is virtualization?
Virtualization is a technology that enables a single server to act as many. Solutions such as VMware’s Virtual Infrastructure work by, in effect, converting hardware into software. This is achieved by the creation of virtual machines (VMs) which VMware describe as, “Tightly isolated software containers that can run their own operating systems and applications as if they were physical computers. A VM behaves exactly like a physical computer and contains it own virtual (software-based) CPU, RAM, hard disk and network interface card (NIC).” In other words, a VM is simply a computer that has been converted entirely into software and packaged into a single fle.
The fact that each VM has its own virtual CPU, NIC, etc., means that it can be run on practically any hardware - even hardware on which other VMs are running. Accordingly, virtualization breaks IT’sone-application-
per-server model by enabling multiple heterogeneous operating systems to be simultaneously run on the same physical server.
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