Swiss N>2 Matchmaking Logic & Tiebreakers

[Deeyo]

First Question where can we learn the logic that is used to match players in swiss system for more than 2 players especially after first round?
for possible 2 options;
1. Try to prevent same players to be opponents twice
2. Don't bother to prevent same players to play again

Second Question
What is the tie breaker for same points at the end of the tournament