Interesting. You click on V1 and get Nikon 1 V1 data. You click on Link and get D7100 Firmware. I am guessing that V1 is the correct data!
I don't know why the V1 even came up as a link. It was just the Firmware version for the D7100, V1.05 is the latest for the D7100. I got the email this morning.