Constant 208 b/s Upload in the Background?

I have recently begun running a network activity monitor, and was surprised to find that there are apparently regular ‘ticks’ of uploading going on, always at exactly 208 b/s per tick. The ticks are extremely regular, although I cannot determine its exact interval. I tried a Google search, and apparently the phrase ‘208 b/s upload’ is a common seach. Unfortunately, the results don’t seem to contain any useful information. Does anyone know what causes these ticks? 208 bits don’t seem to be a lot, but at one tick every two seconds, it amounts to hundreds of MBs per month! With multiple machines on one network, the amount of monthly wasted traffic are well into GB territories…
Answer #1
your firewall should tell you what’s connected and sending
Answer #2
http://technet.microsoft.com/en-us/sysinternals/bb897437
This will tell you exactly what’s sending those bytes..
It’s probably some windows thing talking home..