Unlike the switch, the router ports function similar to a NIC in that they each have a different IP and MAC address
Layer 3
Gateway:
170.170.10.1
Gateway:
170.170.11.1
22-33-44-55-66-77
FF-EE-DD-CC-BB-AA
Every Router Gigabit or Fast Ethernet port has a hard- coded (unchangeable) MAC Address
We assign (Changeable) IP Addresses to Router ports as we need them