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Virtualization is currently one of the hottest topics in the Information Technology (IT) field and it is likely to remain that way for the foreseeable future. While virtualization is important to virtually all IT organizations, it certainly isn't new. IT organizations have been implementing virtualized technologies such as Virtual Local Area Networks (VLANs) and Virtual Private Networks (VPNs) for at least twenty years. In recent years, many network hardware vendors have virtualized technologies that had previously been deployed as dedicated hardware devices and placed the virtualized instances of these technologies into routers and switches.
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