What is MAC Address ?

MAC address (Media Access Control) is also called as Physical address. It is an unique ID of Network Interface Card. It’s a 48 bit binary number, and it’s divided into two parts OUI & Unique Device ID. OUI must have 24 bit & Unique Device ID 24 bit. MAC address is always expressed in a Hexadecimal format. MAC address exists in the Second layer of the OSI Model (Data Link Layer). Every Computer has its unique MAC address. If you change your Network Card then your computer’s MAC address gets changed.

00 - 02 - B2 - 3D - 12 – 48

                           This part is specified        Vendors Serial Number

                           By IEEE Group        


To know your MAC address type ipconfig /all in cmd. 

physical address is the MAC address.