MAC Address

• MAC address are 12 digits hexadecimal number / 48 bits number embedded into network card during the time of manufacturing.
• It is used to uniquely identify a network device.
  

Some Important Terminologies

1. Unicast (one to one): One sender ----- one specific receiver
2. Multicast (one to many): One sender ----- many specific receiver
3. Broadcast (one to all): One sender ----- all receiver