Every fingering that fits a hand
6344
hard
6346
hard
634x
easy
6896
moderate · barre
What is true of it
D♭sus2 is D♭, E♭ and A♭ — 1, 2 and 5 counted from D♭.
These are also the notes of A♭sus4/D♭ and G♯sus4/D♭. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
The easiest of the 4 fingerings below is 6344: 4 fingers, held at the 3rd fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
1 of the 4 need a barre.
Where its notes are on the neck
The brass dots are D♭, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
D♭sus2/E♭
x344
D♭sus2/A♭
1344
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.