Which high availability design consideration produces savings by reducing the number of power
supplies required per switch and the number of outlets required in the wiring closet?

A.
StackPower

B.
Spanning VLANs

C.
QoS

D.
Gateway redundancy

Explanation:

Cisco StackPower technology immediately produces savings by reducing the number of power
supplies required per switch and the number of outlets required in the wiring closet.
Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3750-x-seriesswitches/white_paper_c11-578931.html