3 ms·
Not exactly, the MAC address (which is a far stronger unique identifier than an IP address) will usually only survive the first hop in an IP transmission.
by jiggy2011 14y ago
Not exactly, the MAC address (which is a far stronger unique identifier than an IP address) will usually only survive the first hop in an IP transmission.
- ddunkin 14y agoNot even 'usually', it doesn't exit your LAN at all, once it hits your router, it is stripped and your data is packed with a different MAC address on the WAN (or any other layer 2 identifier depending on your connection), same for each hop after that.
- ay 14y agoIf you use EUI-64 as your interface ID in IPv6, your MAC address is part of your IPv6 address. That said, no modern OS does that anymore, times 1% of IPv6-enabled users, so the closer term is "almost never".