Virtualization is the creation of a virtual version of an operating system , a server, a storage device or a network resources.
Operating system virtualization uses software which allows a piece of hardware to run in multiple operating system images at the same time.
There are mainly three areas of IT where virtualization is making head-roads. They are :
Network virtualization
Storage virtualization
Server virtualization
Network virtualization : Combines the available resources in a network by splitting the available bandwidth into channels, which are independent each other and can be assigned to a particular server or device at the same time. Virtualization reduces the complexity of network by separating it into manageable parts.
Storage virtualization : Combines physical storage from multiple network storage devices into a single storage device which is manageable from a central console. It is commonly used in storage area networks (SAN s).
Server virtualization : Masks the server resources such as the number and identity of individual physical servers, processors, ans OS s from server users. The main intention is not reveal the complicated details of the server resources to the server users.
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