The last 6 hexadecimal digits (or the last 24 bits) in a MAC Address represent the OUI.

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Multiple Choice

The last 6 hexadecimal digits (or the last 24 bits) in a MAC Address represent the OUI.

MAC addresses are 48 bits long and are written as six hexadecimal octets. The first three octets (the first 24 bits) make up the OUI, which identifies the manufacturer. The remaining three octets (the last 24 bits) are the device-specific identifier assigned by that manufacturer to distinguish individual devices. So the last six hex digits do not represent the OUI; they represent the NIC-specific portion. That’s why the statement is false. For example, in 00:1A:2B:3C:4D:5E, 00:1A:2B is the OUI, and 3C:4D:5E is the device ID.

MAC addresses are 48 bits long and are written as six hexadecimal octets. The first three octets (the first 24 bits) make up the OUI, which identifies the manufacturer. The remaining three octets (the last 24 bits) are the device-specific identifier assigned by that manufacturer to distinguish individual devices. So the last six hex digits do not represent the OUI; they represent the NIC-specific portion. That’s why the statement is false. For example, in 00:1A:2B:3C:4D:5E, 00:1A:2B is the OUI, and 3C:4D:5E is the device ID.

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