MAC addresses are unique identifiers that are hardwired to your PC assigned by the vendor
MAC Address: A unique 6-byte address assigned by the vendor of a NIC, consists of 12 hexadecimal digits, the first 6 digits are the OUI of the vendor that built the card, and the last 6 are a unique set chosen by the vendor that built the NIC which only appear on that specific card
OUI(Organizationally Unique Identifier): The first 3 bytes(6 digits) of the MAC address that identifies the manufacturer of the network hardware
DHCP server allocates IP addresses
IP address consists of, in order, Network ID, Host ID, and MAC ID