Is that a typo? While I don't doubt that Alexa sends some amount of data to the internet, I find it hard to believe that it uses 114 mbps per device, maybe you meant 14 mbps?
This is the data to back if up:
Do you have any idea why it takes so much data between the echo and the router then? Other devices in home didn't take that much :(.
So to clarify, it's mean the speed when the device is connected at, but I saw they changing up and down? How does that get calculated if they aren't the actually transmiting data?