Difference between MAC and IP address

Question

I’m aware that the mac address is part of the data link layer, but why can’t I just use my MAC address as IP address, too?
Why do I need both addresses?

In: 14

Answer 1

You need conform to established protocols. The MAC address is visible only to directly connected devices on the same network. If you need to cross a router, the data packet will be sent to one if the router’s MAC addresses and be emitted from a port with another MAC address. Think of it like a numbering of mail exchange points that is internal to a postal system vs street addresses.