Over the years, most of Decker's vertebrae have been replaced with synthetics of varying quality. When jacked in, the jolts of pain allow him to differentiate subroutines.
Neural Networking is a unique augment belonging to Decker, which allows him to reveal the daemon installed on a mainframe device when Decker stands on an adjacent tile. The Neural Networking ability has no cost to use, and can be used any number of times per turn.
While Mask is active, the Neural Networking ability can also be used on devices which do not have daemons installed, in which case it reveals that the device has no daemon.