A real tech head scratcher

ok, i think i get it now

on the embedded machine i would
Code:
dd if=/dev/??? | nc -l -p port#
to serve the entire thing

on the desktop machine i would
Code:
nc host_ip port# | dd of=/temp/iptv_image

since there's no hard drive (hda1 or whatever), what arguement would i put in under /dev/ to serve the entire contents?