It's the 4-5 solution.
Monty Kiffin's defense is predicated upon keeping his safeties in zones that provide the right fields of vision and angles to the flow of a play, whether it be running or passing.
The teams that have had success against Kiffin's version of the Cover 2 (yes, there are variations) are those who were able to get >4 yards per carry from their running game on 1st down. You see, the worst down for TB is second and 5-6 yards. This is a down and distance where Kiffin has to make a choice as to the depth of his linebackers. If June, Ruud and Brooks pinch up to the line of scrimmage to stuff Barber, they'lll be leaving big middle seam routes open for the Cowboys pass catchers. If they decide to sit back and shrink the space between them and the aforementioned safeties, Dallas SHOULD be able to run for good yardage, especially with delays and misdirection.
What is interesting about all of this is that Brad Johnson should know this well, be able to see the LB alignment and make the right audibles, if need be.
Hope for the best...prepare for the worst. Go Cowboys!