JREAP stands for Joint Range Extension Applications Protocol, which is a special way of allowing communication between two different computer systems, like two soldiers' radios.
Imagine you have a toy phone that only works if you're standing really close to the person you're calling. But what if you want to talk to someone who's far away? You might need to use a special device that connects your phone to a big antenna that can reach farther.
JREAP works kind of like that antenna. It allows soldiers who are far away from each other, maybe in different countries, to talk to each other using their radios. When they use JREAP, their messages are sent over a computer network, which is like a big electronic highway, to reach the other radio even if they are very far from each other.
So, JREAP is like a super special way to help soldiers talk to each other even when they are very far apart. It's kind of like a special electronic phone system that can extend for very long distances.