Quote Originally Posted by VOIPoJustin View Post
The keep alive requests are very small, ~1.5 bytes/request.

At 10 requests a minute, you're looking at:

1.5 bytes * 10 * 60 minutes * 24 hours = 21600 bytes (21.094 kilobytes) sent in a day, or approximately .61 megabytes per month.
While the actually request is small, do remember it gets packetized at multiple layers due to the nature of the model. UDP is lightweight (as Brandon also points out) - UDP over IP4 is 20 bytes + the data (the ~1.5 bytes you mention). Then all this becomes data to the next lower level, etc. So the actual impact is at least an order or two of magnitude more.