Earlier quoted context omitted.
Wikipedia says, "In computer networking and computer science, the words bandwidth, network bandwidth, data bandwidth, or digital bandwidth are terms used to refer to various bit-rate measures, representing the available or consumed data communication resources expressed in bits per second or multiples of it (bit/s, kbit/s, Mbit/s, Gbit/s, etc.)." All else being equal, increasing the denominator reduces the rate. It's…
And it's the wrong math. You claim that increasing latency will necessarily decrease bandwidth, and that is simply not the case. If we assume that there are a fixed number of packets in flight at any given time, and we increase the flight time of all packets, then it will be true that the packets-processed-per-time will drop (and ceteris paribus that the bandwidth would drop). This assumption, however, is incorrect.…
My personal understanding of DPI is that they want to do it in-series so as to be able to reset TCP connections immediately upon detecting a hit, but that might not be how they do it.