Which of the following reduces the deployment cost of a wireless LAN?

A.
WPA

B.
802.1x

C.
MIMO

D.
PoE

Explanation:
Power over Ethernet or PoE describes any of several standardized or ad-hoc
systems which pass electrical power along with data on Ethernet cabling. This allows a single
cable to provide both data connection and electrical power to devices such as wireless access
points or IP cameras.