Question

In MAC address, Organisational Unique Identifier (OUI) consists of __________.

• A. 32 bits
• B. 48 bits
• C. 24 bits
• D. 64 bits

Hint:

MAC address = 48 bits → First 24 bits (OUI: manufacturer code), Last 24 bits (NIC-specific).

Answer 1

The Correct Option is C

MAC Address Structure.
- A MAC address comprises 48 bits, equivalent to 6 bytes.
- It is segmented into two components: - Organizationally Unique Identifier (OUI): The initial 24 bits (3 bytes).
- Network Interface Controller (NIC) Specific Part: The subsequent 24 bits (3 bytes).

Conclusion.
Therefore, the OUI consists of 24 bits.
Final Answer: \[\boxed{24 \text{ bits}}\]