An engineer is designing a wireless deployment for a university auditorium. Which two features can be used to help deal with the issues introduced by high AP count? (Choose two.)
should be (RXSOP) and (TPC) as per definitions:
TPC – Transmit Power Control, sets to power to determine the cells boundary
RXSOP – The higher the RX-SOP level, the less sensitive the radio is and the smaller the receiver cell size will be
As for the other options:
TSPEC – Traffic Specification, this is a QoS feature to prioritise traffic
LSS – Location Specific Service, has to do with mDNS and Bonjour
DFS – Dynamic Frequency Selection, is used to back off of radar bands in case radar signals are detected
Provided answer is correct. AGAIN please read the questions, per your own provided info and the question stating "it is a high AP Count atmosphere, This is precisely what DFS is designed for. The correct answers were provided. Don't speculate but validate!
Given Answer is correct:
https://www.cisco.com/c/en/us/support/docs/wireless-mobility/80211/200069-Overview-on-802-11h-Transmit-Power-Cont.html
(Check Section : TPC vs DTPC vs World mode)
TPC vs DTPC vs World mode
This is a discussion forum. Everybody is free to join the discussion, even if they are not 100% sure of the answer. Discussions contribute to learning and understanding. I would not discourage this to anyone.
RxSOP reduces the cell sizes and in this scenario I would definitely implement it
TPC manages the cell sizes; I would configure it
DFS offers more channels, thus more available frequencies, which is an advantage in this scenario.
Three features to consider. Let's discuss
While thinking more and more about this:
DFS itself is not a feature that you helps dealing with this scenario. DFS dynamically selects other channels when radar is detected. Although it's wise to include DFS channels to minimize co-channel interference, we can't change or configure DFS itself.
i agree BC
https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-0/hdx_final/b_hdx_dg_final/high_density_experience_features_added_in_release_8_0.html
"Receiver Start of Packet Detection Threshold (RX-SOP) determines the Wi-Fi signal level in dBm at which an AP radio will demodulate and decode a packet. The higher the RX-SOP level, the less sensitive the radio is and the smaller the receiver cell size will be. By reducing the cell size, we ensure that the clients are connected to the nearest access point using the highest possible data rates. This is ideal for high density environments such as stadiums and large auditoriums where there are a large number of client devices connected per AP. In a high density environment, the smaller the cell size, the better. "
i agree BC
https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-0/hdx_final/b_hdx_dg_final/high_density_experience_features_added_in_release_8_0.html
"Receiver Start of Packet Detection Threshold (RX-SOP) determines the Wi-Fi signal level in dBm at which an AP radio will demodulate and decode a packet. The higher the RX-SOP level, the less sensitive the radio is and the smaller the receiver cell size will be. By reducing the cell size, we ensure that the clients are connected to the nearest access point using the highest possible data rates. This is ideal for high density environments such as stadiums and large auditoriums where there are a large number of client devices connected per AP. In a high density environment, the smaller the cell size, the better. "
CCA/RX-SOP
CCA (clear channel assessment) and RX-SOP (receive start of packet) are extraordinarily complementary to RRM for appropriately sizing WLAN cells in a high-density environment. It is best to think of CCA, TPC (transmit power control), and RX-SOP as working in tandem for determining optimal cell size.
DFS
The ability to use spectrum requiring radar detection is fully supported in HDX. Support for DFS (dynamic frequency selection) permits many more channels to be used, which is essential for environments with many access points and/or many WLANs.
Reference : https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-0/hdx_final/b_hdx_dg_final/high_density_experience_features_added_in_release_8_0.html
https://community.cisco.com/t5/wireless-mobility-documents/cisco-high-density-experience-hdx-enhanced-whitepaper/ta-p/3616207?attachment-id=132610
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