SOME DEFINITIONS FIRST
Traffic Networks are given several names by affiliates, so let me list all that I have heard so far, whichever of them you see, it’s still the same thing : Traffic Source, Ad Network, Banner Network, Traffic Broker. All of these refer to the traditional setup where the network manages advertising placements/spots on the sites of their publishers.
Sometimes you will also see the term “Pop or Popunder Network”, this refers to Traffic Networks that focus exclusively on “Pop Up” or “Pop Under traffic”. Pops are those down-sized, or full size windows that open on top of the browser window or behind it.