A company is experiencing very slow network speeds of 54Mbps. A technician has been hired to
perform an assessment on the existing wireless network. The technician has recommended an
802.11n network infrastructure. Which of the following allows 802.11n to reach higher speeds?
A.
MU-MIMO
B.
LWAPP
C.
PoE
D.
MIMO
Explanation:
Answer: MIMO is a feature in 802.11n which uses multiple antennas to resolve more information than possible using a single antenna. MIMO uses Spatial Division Multiplexing (SDM) which allows for multiple independent (simultaneous) data streams on the same spectral channel. Additionally, 802.11n increases channel with from 20MHz (802.11g) to 40MHz and provides up to double the data rate.
MU-MIMO is not the best answer. MU-MIMO is unique to 802.11ac.
LWAPP is not the best answer. Light Weight Access Point Protocol (LWAPP) allows network administrator to centrally manage the configurations of wireless access points throughout the enterprise.
PoE is not the best answer. Power of Ethernet (802.3af) is a standard for sending 15.4W and a maximum of 350mA of power to each device. Note that the number of active links getting this power is limited by the backplane of the switch itself.
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