The red defense is one of the oldest defensive schemes.  It disappeared for years with the popularity of  Rotation.  Red defense is making a resurgence lately, and any team coached by an old high school coach is likely to play the Red.  Hits are naturally kept in front of the defenders because their base is a lot deeper

Strengths:  Defends the middle attack better because of different starting base.  Defends the line and tips equally well.  Not much movement required for defender to get from their base to their defensive zones.
Weaknesses:  The Up player has a great deal of movement, usually a RB player, so the setter could be out of position in transition.

Red Base
   The base defensive positions for the Red Defense are what give it some of it's strengths.  It does not require much post- set movement, and keeps the wing defenders deep, keeping attacks in front of them.  It does not require the wing player to back up, only move forward.