Seonglae ChoL2 Address, LAN or physical or Ethernet address
MAC address allocation administered by IEEE. Manufacturer buys portion of MAC address space (to assure uniqueness, portability for each subnet)
MAC addresses in frame headers identify source, destination (different from IP address)
Used locally to get frame from one interface to another physically-connected interface (same subnet, in IP-addressing sense)
MAC Address usages
Search - MAC or OUI address lookup - What is my IP address?
https://hwaddress.com/
Countries - MAC or OUI address lookup - What is my IP address?
https://hwaddress.com/countries/