CTI keeps getting asked about old school espionage attempts, it really has not changed much. There has to be a path of some type to get the information voice, data, temperature in the room not to mention video out. The problem is there are a lot of paths, our computers and cell phones are probably the most often used now days, but old school and new technology exist together in this brave new world.
But here is the basics, and we will go on from there. Hope it helps give you all a start.