Without more context, it's difficult to provide a precise explanation or utility of "1001 11" in Red Alert 2: Yuri's Revenge. If you're looking for information on cheats, trainers, or codes for the game, here are some general tips:
While multiple trainers exist for this version, the "+11" or "+12" variants typically include a comprehensive suite of modifications: red alert 2 yuris revenge trainer 1001 11