Which generation of wireless access technology is operating in the millimeter frequency band around 30 GHz?

The correct choice pertains to 5G technology, which operates in the millimeter frequency band, including around the 30 GHz range. This frequency range allows for significantly higher data rates, lower latency, and greater capacity compared to previous generations of wireless technology. The use of millimeter waves in 5G facilitates faster transmission speeds, enabling advancements such as enhanced mobile broadband services, the Internet of Things (IoT), and new applications in various sectors like virtual reality and connected vehicles.

In contrast, 4G operates primarily in lower frequency bands, typically below 6 GHz, focusing on providing broad mobile internet access without the extreme capacities offered by 5G. The earlier generations, such as 3G and 2G, were even more limited in their bandwidth and capabilities, dealing mainly with voice services and basic data transmission, thus not utilizing the millimeter wave spectrum.