While MAC addresses are 48 bits, that is a lot more than the 32 bit IPv4 adresses (even counting the reserved addresses 255, 127, Class D Multicast etc ), will we not eventually run out of them?
Also, IPv6 addresses may be derived from the 48 bit MAC addresses. And IPv6 address space is much larger than the MAC address space. So will we not end up with IPv6 addresses without any MAC address to associate with? Or is there an official plan to duplicate MAC addresses?
Also, are bluetooth MAC addresses in the same space as Ethernet mac addresses?