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Three of the following are forms of virtualisation. Which is the odd one out?

  • A.storage virtualisation using logical volumes
  • B.physical consolidation of servers into one rack
  • C.server virtualisation with a hypervisor
  • D.network virtualisation with overlays

Answer: B

Putting machines in a rack changes nothing about how they are addressed or used. The other three all decouple a logical resource from the physical one beneath it. Consolidation is not virtualisation. Addressing is what changes in the other three.

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