@ArcherC8 Very helpful, thanks! So, IPv4 is what everything is running. I can get v6 set up, but I'm not super familiar with the advantages in performance. Security, I get that part. Google explains...

@ArcherC8 Thanks! I troubleshot quite a bit last night, and seem to have figured out that the slow wired speed is only happening on a 2010 model Mac Mini. My 2018 model is getting 600-700, more...

I recently switched to gigabit Xfinity service, and pulling my hair out to get better speed thru this router. Hard-wired ethernet from modem (Motorola MB8600) to computer is testing in 600-700 Mbps...