How does the Finder determine the model of the remote host? This is metadata in the _device-info._tcp Bonjour service record that is the server advertises. My Synology helpfully shows up as an Xserve, in fact:
$ dns-sd -L "synology" _device-info._tcp local
Lookup synology._device-info._tcp.local
DATE: ---Thu 07 Aug 2025---
0:24:28.117 ...STARTING...
0:24:28.378 synology._device-info._tcp.local. can be reached at synology.local.:0 (interface 14)
model=Xserve
The Finder shows these icons for network volumes.
How does the Finder determine the model of the remote host? This is metadata in the _device-info._tcp Bonjour service record that is the server advertises. My Synology helpfully shows up as an Xserve, in fact: