You cannot play NBA 2K11 online on PC. 2K Sports shut down the game's servers years ago (approx. 2014–2015). No matchmaking, no online association, no crew play, no leaderboards.
NBA 2K11 has a dedicated mod scene (NLSC, ModdingWay) – roster updates (2023–24 rosters), graphics overhauls, cyberfaces, courts, gameplay sliders. Single-player only. Extends replayability massively.
Enjoy the GOAT Jordan cover game offline. For online, move to a supported title.