Parrying is a defensive maneuver, where you swipe your opponent’s punch away.
This article offers some guidelines for blocking in boxing. For rookies and seasoned boxers, blocking is probably the easiest active defense there is. Along with being relatively easy, it is probably the most effective active defense there is. What more could you ask for?
The last punches to learn are the uppercuts. An uppercut is a punch that is thrown upwards instead of straight ahead (jab and straight) or looping to a side (lead and rear hooks).
Slipping punches is the most basic form of dodging, at least in boxing. It is not easy to get wrong, but some would-be boxers manage to mess it up. However, when it is done successfully, for a brief moment it makes you look untouchable.