[Kymmy]

For anyone wanting to spot if a cable is crossover or not...

Just hold the two ends side by side orientated the same way and look at the color coding. If it's identical then it's a Straight Through cable, if the colors are jumbled then it's a cross over cable.

On a router/switch/hub to router/switch/hub connection if you plug in the right cable then both link lights should light up. Also some routers/switches/hubs will have a little puch/toggle switch on one port (either the first or last) which will flick that one port over to cross-over or not. This could be marked uplink and will mean that you can use a through cable in replacement to a crossover cable. As already stated though most moderm routers/hubs/switches autosense and you can use a through cable on all ports