11 Sep
2021
11 Sep
'21
23:55
On 2021-09-11 4:14 p.m., Douglas McGarrett wrote:
Epson WP4530 once had a static IP. Perhaps now damaged by lightning in July. At any rate, nmap shows NO ip address for the printer, yet Windows 10 and Mint can write to it. How does that work?
Fire up Wireshark to see what's happening. Strictly speaking, it is possible to network without an IP address. At the lowest level, only a MAC address is needed. Way back in the Dark Ages, before IP became popular, Windows (and DOS & OS/2) used NetBIOS, which worked with MAC addresses. With IPv4, ARP is used to resolve IP addresses to MAC addresses. https://en.wikipedia.org/wiki/NetBIOS https://en.wikipedia.org/wiki/NetBIOS_Frames