ABC Hospital is planning a Wi-Fi infrastructure upgrade where the 802.11b/g APs (HR/DSSS and ERP)
would be replaced with new dual-radio 802.11n/802.11ac (HT and VHT) APs. ABC wants to minimize the
time and cost associated with performing a new site survey, so they will be mounting all of the new APs in
the same locations and with the same cable drops as the existing APs.

What is one performance drawback with this deployment method?

A.
Multipath will increase, causing excessive layer-2 retransmissions. The retransmissions will cause
latency for VoWiFi handsets.

B.
Increased receiver sensitivity on the VHT APs will cause them to continually change channels to avoid
co-channel interference.

C.
If the existing UTP cabling is not Category 3 or better, the total Ethernet backhaul for each AP will be
limited to 100 Mbps.

D.
The existing WLAN plan, including the AP locations, may not provide the benefits seen in HT and VHT
802.11 PHY capabilities.