> My LAN uses IP addresses.
I've never heard of a LAN without IP addresses. Is that a thing? I'd assume that no IP addresses means you can't even use TCP/IP at all, right? Is there something else you'd use instead?
Quite common to run unnumbered IS-IS backbones. Whether this can rightfully be considered a "LAN" is up for debate.
IPX/SPX is not IP based.
Quite common to run unnumbered IS-IS backbones. Whether this can rightfully be considered a "LAN" is up for debate.