I am also told we need a C9200-NM-4X too. Whats that for? How does it fit together? Why? How? I just want a 10G/1G switch with RJ45 (copper) inputs and SFP+ (fibre) ports. I dont understand what C9200-24T-E and C9200-NM-4X gives me. I've read your datasheet and stil...