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initial mac address vs effective mac address

I have done some reading about Vmware Mac addresses but need some clarification:

initial mac address : is the Mac address of the virtual NIC of the Virtual machine
effective mac address : is the Mac address of the Guest OS

OK, let 's say we have a physical PC and a Physical switch, The PC is connected to the the switch via the Network adapter.
the Network adapter will have it is burned Mac Address
on the PC (assuming it is Windows OS), if I run Getmac it will show the Mac address of the Network Adapter. I do not know of any reason to change the PC mac address from within the OS, or even if it let you change it.

So what would be the reason if changing effective Mac address on Vmware, which by default uses the initial Mac address ?

Thank you

SOLUTION

Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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jskfan

ASKER

confusion is Guest OS mac address and Virtual Nic Mac address

with physical PC, there is no OS Mac address and the Network Adapter Mac Address at the same time, there is only Network Adapter Mac Address

SOLUTION

Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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jskfan

ASKER

For instance in windows, you can run the command below to get Mac Address of the remote computer.

C:\>getmac /S remotepc.domain.com /u administrator /p adminpassword
Physical Address Transport Name
=================== ==========================================================
22-15-25-9C-3A-29 Media disconnected
34-11-45-7A-9C-48 \Device\Tcpip_{678DD7BB-675D-4E4C-E0AE-A261490EBE8C}

Now the Mac addresses shown above are they OS Mac addresses or of the existing Network connections ?

SOLUTION

Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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jskfan

ASKER

OK so the one I displayed above with Getmac cooomand is different than the physical Network Adapter of the computer ?

ASKER CERTIFIED SOLUTION

Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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