Walk past your data center, and you might hear a soft, plaintive call: “Feed me, feed me…” It is not your engineers demanding more pizza. It is your servers and applications. And the call is growing louder. Mobile and virtualized workloads, cloud applications, big data, heterogeneous devices: they are all growing in your business, demanding previously unimagined capacity and performance from your servers and data center fabric. And that demand is not slacking. Your employees, applications, and competitive advantage increasingly depend on it. Those servers and applications need to be fed. And if you have not started planning for 40 gigabits per second (Gbps) to the server rack, you will need to soon.