CREST Practitioner Security Analyst (CPSA) Practice

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Which wireless standard operates at 2.4 GHz and provides a maximum speed of 54 Mbps?

802.11b
802.11g
802.11n
802.11a

The correct answer is: 802.11g

The standard that operates at 2.4 GHz and provides a maximum speed of 54 Mbps is indeed 802.11g. This standard was developed to be backward compatible with 802.11b, which operates at the same frequency but has a lower maximum speed of 11 Mbps. The introduction of 802.11g allowed for higher data rates while maintaining compatibility with older devices, which contributed to its widespread adoption. In contrast, the 802.11b standard has a maximum speed of only 11 Mbps and operates exclusively at the 2.4 GHz frequency. The 802.11n standard can operate on both 2.4 GHz and 5 GHz frequencies and can achieve much higher speeds, often exceeding 100 Mbps, depending on the configuration. The 802.11a standard, meanwhile, operates exclusively at 5 GHz and provides a maximum speed of 54 Mbps but does not operate at the 2.4 GHz frequency at all. Thus, 802.11g stands out as the correct answer since it is the only one among the choices that fits both criteria of operating at 2.4 GHz and reaching a maximum speed of 54 Mbps.