What term describes a layered security approach that provides the comprehensive protection?

Defense in depth 

Defense in depth is the term that describes a layered security approach that provides the comprehensive protection. Defense in depth make use of a series of defensive mechanisms to protect a computer network so that if one mechanism did not work, another will be available to prevent an attack.

we can solve this via the kinematic equation:

where the vertical velocity is zero and so:

since the height of the building is 29.3 meters then:

the ball was in motion for approximately 2.45 seconds

i dont believe in religion. lets all be peace