Developing Applications and Automating Workflows Using Cisco Platforms (DEVASC) — Question 133

What is the purpose of the first three pairs of digits in a MAC address?

Answer options

• A. defines packet forwarding priority sent or received by the adapter
• B. defines a routing identifier for the client
• C. indicates vendor of the network card or adapter
• D. indicates the IP address of the client in Hex

Correct answer: C

Explanation

The correct answer is C because the first three pairs of digits in a MAC address represent the Organizationally Unique Identifier (OUI), which identifies the vendor of the network card or adapter. Options A, B, and D are incorrect as they misinterpret the role of these digits in the MAC address structure.