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:

Question

Which layer of the OSI model is responsible for IP addressing and routing?

Answer 1

The correct response is: (B) and (C) exclusively.

Evaluation of each assertion follows:

(A) Modification is possible by relocating a device between networks: This assertion is predominantly incorrect. A MAC address is permanently embedded in the network interface controller (NIC) and does not typically change when a device transitions to a different network. While software-based MAC address spoofing exists, it is not a standard procedure for inter-network device migration.
(B) A MAC address comprises 12 hexadecimal digits: This assertion is accurate. A MAC address is structured as 6 octets, with each octet represented by two hexadecimal digits, resulting in a total of 12 hexadecimal digits, for instance, 00:1A:2B:3C:4D:5E.
(C) A unique identifier linked to a network adapter (NIC): This assertion is accurate. The MAC address serves as a distinct identifier assigned to a network interface controller (NIC) for network-based communication within a specific network segment.
(D) Assigned by the Internet Service Provider for internet connectivity location: This assertion is incorrect. MAC addresses are not issued by Internet Service Providers (ISPs). They are assigned by the hardware manufacturer. ISPs utilize IP addresses for device location and management on the internet, not MAC addresses.

The Correct Option is A