Exam 350-401 topic 1 question 220 discussion

Answer A is correct "Perhaps the most important new capability introduced with Wi-Fi 6 is Orthogonal Frequency Division Multiple Access (OFDMA). This RF modulation technique allows multiple Wi-Fi 6 clients to simultaneously receive data during the same transmit opportunity. Allowing more information for multiple devices to be transmitted in parallel during a particular window of opportunity, all while reducing some of the traditional overhead of sending the same amount of information independently. OFDMA divides a channel into further subcarriers compared to Orthogonal Frequency Division Multiplexing (OFDM)" https://www.cisco.com/c/en/us/solutions/cisco-on-cisco/enterprise-wifi-6.html

It's important to note the difference between OFDM and OFDMA: - OFDM: Means using different sub-signals in the spectrum for THE SAME user, introduced in Wi-Fi 2 (802.11a) and being used in all following standards. - OFDMA: Means using different sub-signals in the spectrum for DIFFERENT USERS at the same time, introduced in Wi-Fi 6 (802.11ax).

Also Wi-Fi Protected Access 3 (WPA3) is available in Wi-Fi 6 and is mandatory for Wi-Fi 6E. WPA3 adds more robust 192-bit encryption, providing consistent cryptography and helping eliminate the "mixing and matching of security protocols"that are defined in the 802.11 standard. Additionally, WPA3 requires Protected Management Frames (PMF) negotiation. PMF provides an additional layer of protection from deauthentication and disassociation attacks. So there should be two correct answers to this question