Here's an easy one for someone, but just not for me.
I plugged all our computers into a switch. All but one has two green lights that come on when they plug into the switch. One cable only has one of the green lights come on. This particular cable goes into a hub and then two more computers. They appear to be functioning normally, but it puzzles me as to why only one green light is lit. Does this indicate some type of problem and what does it mean?