Name two common 802.11 wireless standards and one major improvement.

• A. 802.11b and 802.11g; improvement: increased range.
• B. 802.11n and 802.11ac; improvement: MIMO.
• C. 802.11ac and 802.11ax; improvement: higher throughput with OFDMA.
• D. 802.11a and 802.11ad; improvement: lower latency.

Answer: (C)

Two common 802.11 wireless standards in use today are 802.11ac (Wi‑Fi 5) and 802.11ax (Wi‑Fi 6), and the major improvement described is higher throughput enabled by OFDMA, introduced with 802.11ax. OFDMA splits a channel into multiple subcarriers so the access point can serve several devices at once, boosting efficiency and overall data rates, especially in crowded environments. While 802.11ac did improve speeds over earlier standards, the standout upgrade associated with pairing ac with ax is this shift to OFDMA, which represents a significant leap in how spectrum is shared and utilized.