ISP capture traffic samplings in both directions Upstream at aggregation points , Downstream at ingress and your DNS queries but the last part everyone knows . Some of the most expensive gear is used to sample and aggregate that data
On Mon, May 15, 2023 at 7:01 PM Michael Thomas <m...@mtcc.com> wrote: > > And maybe try to monetize it? I'm pretty sure that they can be compelled > to do that, but do they do it for their own reasons too? Or is this way > too much overhead to be doing en mass? (I vaguely recall that netflow, > for example, can make routers unhappy if there is too much "flow"). > > Obviously this is likely to depend on local laws but since this is NANOG > we can limit it to here. > > Mike > >