Here's what I've got.

1. Dodging. Self explanatory. Keep your eye on the hands and move out of the way of their punches. 1960's Ali and Floyd Mayweather show some excellent examples of doing this.

2. Head movement. Learn to vary, and bob and weave. Frazier's got excellent head movement. Watch some Floyd Patterson as well, for a guy who is more straight up and down, rather than a guy who is often times dipping.

3. Catch it with your arms/hands.

4. Shoulder roll is catching the punch with the shoulder. Pay attention to Mayweather's fighting. He does it excellently.

5. Slipping is ducking underneath a punch, and countering over or around their arms. Tyson and Frazier do this well. Marciano does it excellently.

The best way to learn how to box defensively is by studying the great fighters, and sparring. Take tactics you see from boxers, and try it in the ring. Practice makes perfect.

Any other questions?