Does the NIC in your 5150 connect to a 10 gig switch?
The only reason to keep a 10Mb hub around is if you want to use coax and have a coax + Ethernet hub to bridge networks.
Or you want to use a packet sniffer.
Huh, so this is something intermediate between 1gig and 10gig, from the little bit of reading I just did...why would we need that? 10gig hardware is pretty cheap nowadays.
It is about the Ethernet cable I believe, especially support for Cat5e and Cat6 cables already installed.