MAC addresses are an Ethernet thing, but Ethernet is not the only LAN protocol in existence. The way I heard it, IPv6 reserves 64 bits for local addresses beca

MAC addresses are an Ethernet thing, but Ethernet is not the only LAN protocol in existence. The way I heard it, IPv6 reserves 64 bits for local addresses because there are some non-Ethernet LAN protocols which uses 64 bits instead of 48.