3rd
Possession or production of child pornography is a crime, everywhere. If you have knowledge of it happening, then you have a duty to report it to the police. When designing communications infrastructure, this should be taken into account in the same way it’s considered in other industries: do makers of cars wonder what would happen if their vehicles were used to transport CP? Do makers of cameras struggle to build detection and tracking of potential CP images in to their hardware? Do we record the names, dates and times that each person enters and leaves a room, just in case we happen to learn that CP was made in that room at a certain date and time? No, we don’t.
The network does not need to take any specific measures based on type of traffic. In fact, it should arguably be content-agnostic, acting as a common carrier for any data. If a crime occurs, you deal with it the same way you deal with any other crime at any other place and time.

