Which new enhancement was implemented in Wi-Fi 6?
Which new enhancement was implemented in Wi-Fi 6?
Wi-Fi 6 introduced several enhancements, one of which is Uplink and Downlink Orthogonal Frequency Division Multiple Access (OFDMA). OFDMA is a modulation scheme that allows multiple devices to be served simultaneously on the same frequency channel, improving efficiency and reducing latency. This is a significant improvement over previous Wi-Fi standards, which used Orthogonal Frequency Division Multiplexing (OFDM) that could only serve one device at a time on a given frequency channel. Additionally, while other options like WPA3 and 4096-QAM are related to security and modulation enhancements, they are not the defining new capabilities introduced specifically by Wi-Fi 6.
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
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
Do not take my reply as 100% correct answer, it is a personal opinion. I believe this is strictly a matter of standard naming: - Uplink and Downlink Orthogonal Frequency Division Multiple Access is a feature part of 802.11ax = WiFi 6 standard - WPA3 is a security 'suite' (let's say) that is required to secure 802.11ax standard implementations, but WPA3 per se is NOT PART OF 802.11ax, therefore, WPA3 is not introduced by 802.11ax I believe it is the same situation as Wi-Fi 5 and WPA2: - Wi-Fi 5 is defined in 802.11ac - WPA2 is defined in 802.11i - Wi-Fi 5 uses WPA2 as a security method but WPA2 is NOT introduced by Wi-Fi5. They are totally separate standards
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).
A is correct