Minor correction: it technically is connected to NIPR ("the internet") via cross-domain guards. Most information would go one-way, low to high, but very specifi

Minor correction: it technically is connected to NIPR ("the internet") via cross-domain guards. Most information would go one-way, low to high, but very specific applications do warrant information going from Secret to unclassified in a very controlled manner, especially when it is time sensitive. It is actually an incredibly interesting topic, but it is hard to get much information on the specifics online (I assume many details are classified or at least SBU).