When considering data rates available in HT and VHT PJY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?

What factor will have the most significant impact on the amount of wireless throughput available to each station within a BSS?

Which one of the following channels can be used for VHT transmissions?

An RF signal sometimes bends as it passes through some material other than free space.
What is the term that describe this behavior?

ABC Company is planning to install a new 802.11ac WLAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. ABC Company has hired you to perform the RF site survey. During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11 access points, both using
802.3 PoE.
After hearing this information, what immediate concerns do you note?