In the MAC address example 00-50-56-C0-00-04, how many octets make up the OUI?

In the MAC address example 00-50-56-C0-00-04, how many octets make up the OUI?

• A. Four
• B. Five
• C. Three
• D. Six

Answer: (C)

The OUI is the first 24 bits of a MAC address, which means it consists of the first three octets. In 00-50-56-C0-00-04, those three octets are 00-50-56, so the OUI is three octets long. The remaining three octets (C0-00-04) identify the specific device within that vendor’s assignment.

The OUI is the first 24 bits of a MAC address, which means it consists of the first three octets. In 00-50-56-C0-00-04, those three octets are 00-50-56, so the OUI is three octets long. The remaining three octets (C0-00-04) identify the specific device within that vendor’s assignment.