realtime

This is my first CRV. And I was just wondering how does the realtime 4WD work with VSA. On a 2 wheel drive vehicle, as soon as the front wheels start slipping while driving up a slippery slope, the power continuously is cut as you continue to spin your tires and makes it impossible to get up...

any idea on how this thing works?? does this means that when i drive the car the 4x4 is already engaged?? sorry bout this silly question but i dont know this concept of "realtime 4x4" any info and insights would help:confused::confused::confused: