How can I know the hardware vendor from an ethernet address?
The first three octets of a six-octet ethernet address typically uniquelyidentifies the hardware vendor of the particular network interface card.
This is called the "Organizationally Unique Identifier" (OUI). OUI
information, including the most recent list of public OUIs can be found at
"http://standards.ieee.org/db/oui/index.html"
Note that it is possible that an unidentified OUI could be used, since
vendors are not required to make their OUIs public, and many network
interfaces, including Suns, can be configured to use a custom ethernet
address, so there is no guarantee that the OUI will correctly identify
the vendor.
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