How far can the second computer be if I want to connect it to the router modem for b/b. My sons comp is on the first floor and I want to connect it to my modem router downstairs where my comp is. Will it work.
The spec for a Cat5 cabled ethernet connection is about 100 mtrs, my experience is that the connection dies very quickly if you go past this limit, however you could buy a small hub which would refresh the signal and allow an additional length. I have had my system running with the longest cable that Maplins sell - more than enough to go from any room in my house to any other - without a problem.