For a game like FC 26, which would likely require an internet connection for Ultimate Team, Squad Battles, or roster updates, —often only offering offline Kick-Off and Career Mode (if even that, given EA’s online-centric DRM).
The FC26 NSP protocol operates on a master-slave architecture, where one device acts as the master, and the other devices act as slaves. The master device initiates communication, sending requests to the slave devices, which respond with the requested data. This communication occurs over a network, typically using a 26-pin connector. fc26 nsp