So, if we want to track something that was spreading through a network, what we ideally would like to do is to set up sensors on the central individuals within the network, including node A, monitor those people that are right there in the middle of the network, and somehow get an early detection of whatever it is that is spreading through the network.
Por lo tanto, si quisiéramos seguir algo que se está propagando por una red, lo ideal sería poner sensores en los individuos del centro de la red, incluyendo el nodo A, y monitorear a esas personas que están justo en el centro de la red, para, de algún modo, detectar en forma temprana lo que sea que se esté difundiendo por la red.