Not quite: AWD has diffs between each of (FR,FL), (RR,RL), (F,R).
4WD has diffs between (FR,FL) and (RR,RL), but it has a transfer case (like a permanently locked center diff) between F and R.
So you’re not supposed to use 4WD on dry asphalt roads because the natural slippage between front and rear has no easy way to release itself.
Modern diffs are usually limited slip, which helps prevent spinning tires. LSD can either be mechanical or computer controlled. Computer controlled LSD can apply brakes to individual tires.
4WD has diffs between (FR,FL) and (RR,RL), but it has a transfer case (like a permanently locked center diff) between F and R.
So you’re not supposed to use 4WD on dry asphalt roads because the natural slippage between front and rear has no easy way to release itself.
Modern diffs are usually limited slip, which helps prevent spinning tires. LSD can either be mechanical or computer controlled. Computer controlled LSD can apply brakes to individual tires.