Given: ABC Hospital is planning a Wi-Fi infrastructure upgrade where the 802.11b/g APs would be
replaced with new dual-radio HT (802.11n) 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?
Multipath will increase, causing excessive layer-2 retransmissions. The retransmissions will
cause latency for VoWiFi handsets.
Increased receiver sensitivity on the HT APs will cause them to continually change channels to
avoid co-channel interference.
If the existing UTP cabling is not Category 6 or better, the total Ethernet backhaul for each AP
will be limited to 100 Mbps.
In locations with line-of-sight to client devices and little multipath, the benefits of MIMO may be
less significant than in other areas.