What is the significance of MAC address?

Q. What is the significance of MAC address?

Answer:-

The NIC manufacturer assigns a unique physical address to each NIC card; this physical address is known as Media Access Control address (MAC address). A MAC address is a 6-byte address with each byte separated by a colon e.g., a sample MAC address could be:

10 : B5 : 03 : 63 : 2E : FC

So, now you know that this MAC address is actually the number assigned to the network card of your computer. The first three bytes of MAC address are the manufacturer-id (assigned to the manufacturer by an international organization namely IEEE) and the last three bytes are the card-no (assigned by manufacturer).