MAC Address

• Every computer has a unique way of identifying itself : MAC address or physical
• The physical address is located on the Network Interface Card (NIC).
• MAC addresses have no structure, and are considered flat address spaces.
It has 48 bits the first 24 bits are for the vendor and the next 24 bits are unique NIC
• MAC addresses are sometimes referred to as burned-in addresses (BIAs) because
they are burned into read-only memory (ROM) and are copied into random-access
memory (RAM) when the NIC initializes.
• 0000.0c12.3456 or 00-00-0c-12-34-56

MAC address are used by MAC layer to identify the destination.