A quick look at wiki tells us...............

Tie deciders

If the match ends with the scores tied and there must be a winner, the tie is broken with a one over per side "Eliminator"[13] or "Super Over":[14][15]

* Each team nominates three batsmen and one bowler to play a one-over per side "mini-match", referred to as a "One1".[16][17] In turn, each side bats one over bowled by the one nominated opposition bowler, with their innings over if they lose two wickets before the over is completed. The side with the higher score from their over wins:

Posted By: DrDublin, Jun 16, 12:45:15