OCR GCSE SLR1.4 Virtual networks

Not to be confused with virtual memory (1.2) or virtual storage (“the cloud” 1.4), a virtual network is the concept of using a software layer to apply security restrictions over a physical network.  In doing so it provides a layer of “abstraction” (see 2.1) that changes the logical view of a network without impacting on the physical reality of the infrastructure.  This video explains the concept of virtual networks or VPNs at a level suitable for GCSE.