An AP is receiving 802.11 packets on its 802.11a radio with an RSSI value of -77 dBm. The current AP is part of an AP group that has been assigned an RF profile with RX-SOP set to Medium for 802.11a. Which action does the AP take with the packets?
A.
All frames are classified as non-Wi-Fi frames and are not decoded by the 5 GHz radio.
B.
Frames are decoded by the 2.4 GHz radio.
C.
All frames are classified as non-Wi-Fi frames and are not decoded by the 2.4 GHz radio.
My opinion is D:
.11a radio means we are at 5Ghz.
RxSOP Medium setting means signal lower than -78dBm is ignored. So -77dBm is normally decoded by 5G radio
https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-1/configuration-guide/b_cg81/b_cg81_chapter_010001111.pdf
The answer is D
Medium Threshold Rx-SOP: 2.4Ghz is -82dBm and 5Ghz is -78dBm
All frames received with weaker RSSI than configured RS-SOP will be classified as non-WiFi frames and will not get decoded by the radio, only packets with acceptable RSSI values are decoded. Packets that are not decoded are treated as non-WiFi interference and detected at the AP as noise. So since -77dBm is not at the threshold of -78dBm the RSSI of -77dBm will be decoded by 802.11a (5Ghz)
I honestly believe that the 2.4GHz will decode this because the High threshold for 2.4GHz is -79 dBm so -77 is better ,why would it drop a better packet received at a better threshold?
They are asking about the 802.11a (5Ghz radio) not the 2.4...
As per walacky's comment above, -78dBm or lower is ignored so the answer in this case is D.
upvoted 2 times
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