Which one of the following 802.11 PHYs is more likely to be used in an industrial deployment but not likely to be used in standard office deployments?

S1G is one of the 802.11 PHYs that is more likely to be used in an industrial deployment but not likely

to be used in standard office deployments. This is because S1G stands for Sub-1 GHz, which means it

operates in the frequency bands below 1 GHz, such as 900 MHz and 868 MHz. These bands offer

better penetration and range than the higher frequency bands used by other 802.11 PHYs, such as

2.4 GHz and 5 GHz. This makes S1G suitable for industrial applications that require robust and

reliable wireless communication in harsh environments, such as factories, warehouses, mines, and

smart grids. S1G also supports low-power and low-data-rate devices, such as sensors, actuators, and

meters, which are common in industrial Internet of Things (IoT) scenarios. VHT, OFDM, and HT are

other 802.11 PHYs that are more commonly used in standard office deployments, as they offer higher

data rates and capacity than S1G, but have lower range and penetration. Reference: CWNA-109

Study Guide, Chapter 3: Radio Frequency Technologies, page 751