A company has recently implemented a high density wireless system by having a junior technician install
two new access points for every access point already deployed. Users are now reporting random wireless
disconnections and slow network connectivity. Which of the following is the MOST likely cause?

A.
The old APs use 802.11a

B.
Users did not enter the MAC of the new APs

C.
The new APs use MIMO

D.
A site survey was not conducted

Explanation:
To test the wireless AP placement, a site survey should be performed.
Incorrect Answers:
A: 802.11a operates in the 5 GHz frequency spectrum, and is therefore less likely to have disconnections
and slow network connectivity.
B: Entering the MAC address will not prevent disconnections, or speed up network connectivity.
C: This cannot be the cause because MIMO would increase network availability.

https://technet.microsoft.com/en-us/library/dd348467(v=ws.10).aspx
http://en.wikipedia.org/wiki/MIMO
http://en.wikipedia.org/wiki/IEEE_802.11a-1999