Question

Which of the following statement(s) is/are TRUE in respect of Media Access Control (MAC) Address?
Options:
(A) It can be changed if a node is removed from one network and connected to another network.
(B) Each MAC address is a 12-digit hexadecimal number.
(C) It is a unique value associated with a network adapter called NIC.
(D) It is provided by the Internet Service Provider to locate computers connected to the internet.
Choose the correct answer from the options given below:

• A. (B) and (C) only
• B. (A), (B), and (C) only
• C. (C) and (D) only
• D. (A) and (B) only

Answer 1

The Correct Option is A

The correct statements about MAC addresses are (B) and (C) only.

Additional Context:

• MAC Address Properties:
  • (B) Format: 12-digit hex (6-byte) like 00:1A:2B:3C:4D:5E
  • (C) Uniqueness: Burned into NIC by manufacturer
• Why Other Options Are Incorrect:
  • (A): MAC is hardware-based (can be spoofed but not inherently changed)
  • (D): ISPs assign IP addresses, not MAC addresses
• Technical Details:
  • First 3 bytes: OUI (Organizationally Unique Identifier)
  • Last 3 bytes: Device-specific
  • Used in Layer 2 (Data Link) communications
• Practical Example:
  • Finding MAC: ipconfig /all (Windows) or ifconfig (Linux/Mac)

Correct Answer: (1) (B) and (C) only.