RE: What percentage of the Internet Traffic is junk?

There is also a lot of "background Internet radiation" coming from p2p applications which seem to remember their peers for a week or two. These usually account for most of the unidirectional traffic knocking on doors unanswered. (not counting large DDoS).

Pete

While working on a private network, I captured some packets trying to reach off-net destinations. After the initial panic that something might be leaking, we figured out that these packets were being generated by applications which were trying to communicate with their mother ships for software updates. These automatic update requests would qualify as junk for some, not for others I suppose.