Eep i hope this doesn’t turn into one if those threads (again). I would replace the most upstream ethernet cable with as much fibre cable as possible and keep the DAC/streamer side ethernet cable to 6-inches if you can. In this case (6-inches length) it may (or not) make this most downstream ethernet cable much less significant - compared with the initial ethernet cable that the fibre is replacing… Blue Jeans Cable made me nice 6-inch Cat 6 Belden cable, tested and certified and cheap.