is physical address the same as mac address
MAC address A MAC may be referred to as the burned-in address (BIA). It may also be known as an Ethernet hardware address (EHA), hardware address or physical address (not to be confused with a memory physical address).
Computer data storage Data are encoded by assigning a bit pattern to each character, digit, or multimedia object. Many standards exist for encoding (e.g., character encodings like ASCII, image encodings like JPEG, video encodings like MPEG-4).
IPv4 IPv4 uses 32-bit addresses which limits the address space to 4294967296 (232) addresses.
Marcus Álvarez