What technology is used in rugby league?

Answer 1

There is a video ref used in Rugby League. In the NRL in Australia and New Zealand, there's one at every game whereas in Europe, there is one at the televised matches, though not at the others.

The video ref was first used to adjudicate, where called for by the on-field referee, on tries only, but his remit has been widened. If the on-field ref has missed some foul play, the video ref can draw it to his attention and 40/20 kicks can be referred (that's when a player kicks from inside his own 40-metre zone and the ball bounces in the field of play before going out in the opposition's 20-metre zone. That results in a scrum to the kicking team).