a fault
Because a serve hits the net.
In tennis, you serve the ball from behind the baseline into the diagonally opposite service box on the other side of the net.
Do you mean "let"? If so, a let is when a serve touches/nicks the net AND lands in on a player's serve. People call "let" so the server knows their serve hit the net. If a server hits a let, they get to redo their serve.
Yes, in tennis, a serve that hits the net and lands in the correct service box is considered a let and the player gets another chance to serve without penalty.
Yes
There are no 'faults' in tabletennis. If you miss the first serve, you lose the point. However, having said that, if you serve a "let" - where the ball plays truly on each side of the net, but touches the net in its travels across the net, you are permitted to retake your serve to make it a 'clean' serve that does not touch the net.
If it hits the net and goes into the service box, you get one re-serve (as opposed to getting two re-serves if you do that on your first serve). If it hits the net and does not land in the service box, then it is a double fault.
The opposition get a point for a double fault
It is called a "let" in tennis when the ball hits the net because "Filet" is the French word for net and the game originated in France.
It is called a letThe server gets to reserve the serve that was a let
Of course! As long as it doesn't hit the net and then go over, it's fine.
In table tennis doubles, each player on a team takes turns serving. The serve must be diagonal, starting from the right side of the server's court to the opponent's right side. The serve must bounce on the server's side first, then over the net to the opponent's side. The serve must also be hit from an open palm and be below the waist. If the serve hits the net and goes over, it is a let and the serve is retaken.