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universally administrated address (UAA)

In the MAC address there is an identifier whether it is managed universally or locally. For this identification there is the U/L bit, which is the seventh bit in the first byte of the MAC address. U/L stands for Universal/Local, and if the U/L bit is set to 0, it is a Universally Administered Addresses (UAA), which is administered by the IEEE

. If the U/L bit is setto 1, it is a Locally Administered Address

(LAA). The UAA address comprises the first 24 bits of the 48-bit MAC address.

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Englisch: universally administrated address - UAA
Updated at: 27.05.2011
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Translations: DE