I have a little experience with ethernet LANs. I usually adhere to the 5-4-3 rule when expanding my LANs. However, what are the limiting factors when cascading fast ethernet switches? Can the total length of Cat 5 ever excede 400 meters between any two nodes? I'm looking for guidelines / specs. I've been searching the internet and I seem to find conflicting opinions. Any general guidlines will help. Perhaps I need to incorporate a bridge???