Yes, exactly.... all newer generation ethernet cables are backwards-compatible. So, as Robert said, I would suspect a computer LAN port, or switch/router issue. Chris Hart Computer Support & Technology Consulting for Connecticut and Western Massachusetts Tel: 860-291-9393 http://www.MyMacTech.com On 8/11/14, 9:57 PM, "Robert Heller" <heller at deepsoft.com> wrote: > >Also, Cat 6 cables should be 'downward' compatible, since they are wired >the >same (Cat 6 cable just has twice the number of twists, which means it can >handle 1GBit without cross talk). If you are having problems with Cat 6 >cable, either the Cat 6 cable(s) you have are bad or there is something >fishy >with your router or PC. >