Virtual machines and machine identifiable information

Virtual Machines are a form of sandbox. The operating machine running inside a virtual machine has no idea (unless the Virtual Machine software itself notifies it in some way) that it is running in a virtual environment.

One of the mostly used parameters that are unique in each computer is the network card's MAC address and in some virtual machines software, the virtual machine software must make sure that in each operating system running in a virtualized environment, the MAC address is unqiue, otherwise, some code that rely on the fact that MAC addresses (in most cases) are unique, will break, or cause as problem.

Technically, if the virtual machine software does not inform the operating system running in the virtualized environment about the various identifiable parameters of the host machine, there is no way that the operating system inside the virtualized environment can access them.