Mac Address

[jd]

Do all pc's ethernet Mac Address(phisical address) only
have 12 digits?

Thanks,

[Marc Reynolds [MSFT]]

Hi,

Yes, Ethernet numbers include a 48-bit media access control (MAC) address
assigned to each Ethernet interface, and the 16-bit value used in the Type
field of the Ethernet frame. Each Ethernet interface is assigned a unique
MAC address at the time of manufacture. The first 24 bits of the MAC
address consist of an Organizationally Unique Identifier (OUI) assigned to
a vendor by the IEEE (which is why they are also called vendor codes). The
Ethernet vendor combines their 24-bit OUI with a unique 24-bit value that
they generate to create a unique 48-bit address for each Ethernet interface
they build.

Thanks,
Marc Reynolds
Microsoft Technical Support

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