What are the different ways to play a D chord on a guitar?

There are several ways to play a D chord on a guitar. The most common way is to place your index finger on the second fret of the G string, your ring finger on the third fret of the B string, and your middle finger on the second fret of the high E string. Another way is to use a barre chord shape by barring the second fret with your index finger and placing your other fingers in the same positions as before.