MAC address vs. IP address.MAC Address: A MAC address is a digital name of interface. Each and every network interface has a unique MAC address with unique ones. It is a hexadecimal number of 12 or 16 digits length. These addresses uniquely identify Ethernet network cards. Although all the computers in the network use Ethernet, not all connections are made over Ethernet.
IP Address: An address that is assigned for connecting the PC or Laptop to the router or to the default gateway of network. Computer systems on the same local subnet, share part of their IP addresses. Like 192.168.6.121 and 192.168.6.130.