MAC Addresses

01-AB-2C-04-E6-1B

• OUI: 01-AB-2C

  • Organizational Unique Identifier (OUI)
  • Depends on organization

• Interface identifier: 04-E6-1B

  • Is unique for every single network card

• Layer 2 addresses for interfaces

• Physical address

• Consists of 48 bits

• Can be represented differently:

  • 01:AB:2C:04:E6:1B
  • 01AB2C.04E61B
  • 01-AB-2C-04-E6-1B

• First half of address is OUI

• Second half is set by vendor.