Simple: let's say your house is fitted with a gigabit connection but the infrastructure sill isn't there. this means that when the infrastructure comes you will

Simple: let's say your house is fitted with a gigabit connection but the infrastructure sill isn't there. this means that when the infrastructure comes you will have to do zero work on your house. no changing of wires, no breaking the walls, no wasting everyone's time. I don't have a 10Gb/s switch at home, but I still use Cat6 so when I upgrade I won't have to crawl around my house to change everything