You manage a WLAN with 100 802.11ac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?
You manage a WLAN with 100 802.11ac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?
In a WLAN using 802.11ac access points configured for 80 MHz channels, if only 40 MHz communications are seen, it is likely because the clients connected to that Basic Service Set (BSS) are all 802.11n STAs or lower. 802.11n clients support up to 40 MHz channels, whereas 802.11ac clients can support wider channels like 80 MHz. Therefore, the presence of only 40 MHz communications suggests that the connected devices are unable to utilize the 80 MHz channels typical of more advanced 802.11ac devices.
While most 802.11n and 802.11ac clients support 40 MHz channels, not all 802.11ac clients support 80MHz channels, and no 802.11n clients can support it. I believe the correct answer is B. (https://7signal.com/802-11ac-migration-part-2-whats-nobodys-telling-you-about-80mhz-and-160mhz-channel-bonding/)
802.11n can support up to 40MHz
Hence the answer is B