Payment in Arrears interest

pawn

Hey guys, am still somewhat confused as to what instruments requirement the payment in arrears (i.e. those that reference the current LIBOR for a payment in the future).

1. Other than interest rate caps and floors, interest rate swaps, are there any others that require payment in arrears?

2. Do interest rate call/put options have payment in arrears? Am confused on this point becos interest rate caps and floors are essentially series of calls and puts, but it appears that when we use interest rate call/put options, the payment is referenced based on the current LIBOR at the time of the payment