Wi-Fi Standards — 54 Mb/s at 2.4 GHz Which IEEE 802.11 WLAN amendment supports a theoretical maximum data rate of up to 54 Mb/s in the 2.4 GHz band?

Introduction / Context:
Wireless LAN standards differ by frequency bands and achievable data rates. Memorizing which amendment offers which speeds and bands is a frequent certification requirement and practical for troubleshooting Wi-Fi performance.

Given Data / Assumptions:

• We are comparing 802.11a/b/g/n families at a high level.
• The target is 54 Mb/s at 2.4 GHz.
• The question focuses on theoretical maximums, not real-world throughput.

Concept / Approach:
802.11g operates in 2.4 GHz and supports up to 54 Mb/s using OFDM, backward compatible with 802.11b. By contrast, 802.11a runs at 5 GHz with up to 54 Mb/s; 802.11b provides 11 Mb/s at 2.4 GHz; 802.11n can use 2.4 or 5 GHz with higher rates via MIMO; 802.11ac (not in the original options list) is 5 GHz only with much higher rates.

Step-by-Step Solution:
Match frequency: 2.4 GHz narrows choices to b/g/n.Match speed: 54 Mb/s aligns with g (and a at 5 GHz).Conclude 802.11g is the correct amendment for 54 Mb/s at 2.4 GHz.Select option C.

Verification / Alternative check:
Vendor datasheets and certification study guides consistently list 802.11g as 2.4 GHz with up to 54 Mb/s nominal data rate.

Why Other Options Are Wrong:

• A: 54 Mb/s but at 5 GHz, not 2.4 GHz.
• B: 11 Mb/s at 2.4 GHz.
• N: Higher rates, MIMO, 2.4/5 GHz; not limited to 54 Mb/s.
• AC: 5 GHz only, far higher speeds.

Common Pitfalls:
Confusing 802.11a and 802.11g because both list 54 Mb/s; the band differentiates them.

Final Answer:
G